No. There is a famous example of a factor of $x^{105}-1$ 

\begin{align}
\Phi_{105}(x) = &amp; \; x^{48} + x^{47} + x^{46} - x^{43} - x^{42} - 2 x^{41} - x^{40} - x^{39} + x^{36} + x^{35} + x^{34} \\
&amp; {} + x^{33} + x^{32} + x^{31} - x^{28} - x^{26} - x^{24} - x^{22} - x^{20} + x^{17} + x^{16} + x^{15} \\
&amp; {} + x^{14} + x^{13} + x^{12} - x^9 - x^8 - 2 x^7 - x^6 - x^5 + x^2 + x + 1
\end{align}

See cyclotomic polynomials

Also $x^4+1=(x^2+1)^2-2x^2$ has the factorisation $(x^2+\sqrt 2 x + 1)(x^2-\sqrt 2 x +1)$ which isn't integral, but does suggest that lower degree counterexamples may exist.

Maximum absolute value of polynomial coefficients
In my application i want to enable  proguard for that i added proguard.config=proguard.cfg
in project.properties.

My proguard.cfg contains

-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-dontwarn javax.management.**
-dontwarn java.lang.management.**
-dontwarn org.apache.log4j.**
-dontwarn org.apache.commons.logging.**
-dontwarn org.slf4j.**
-dontwarn org.json.*
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
-keep class javax.** { *; }
-keep class org.** { *; }
-keep class twitter4j.** { *; }

-keepclasseswithmembernames class * {
    native &lt;methods&gt;; }

-keepclasseswithmembers class * {
    public &lt;init&gt;(android.content.Context, android.util.AttributeSet); }

-keepclasseswithmembers class * {
    public &lt;init&gt;(android.content.Context, android.util.AttributeSet, int); }

-keepclassmembers class * extends android.app.Activity {    public void *(android.view.View); }

-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String); }

-keep class * implements android.os.Parcelable {   public static final android.os.Parcelable$Creator *; }


My console:

[2013-06-06 18:32:00 - Explosionfilters] Proguard returned with error code 1. See console
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.io.Buffer
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields$Field
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields$Field
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields$Field
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.Address
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.io.Buffer
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.Address
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields$Field
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.HttpRequestAdapter: can't find referenced class org.mortbay.jetty.HttpFields
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.jetty.JettyOAuthConsumer: can't find referenced class org.mortbay.jetty.client.HttpExchange
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.signature.OAuthMessageSigner: can't find referenced class org.apache.commons.codec.binary.Base64
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.signature.OAuthMessageSigner: can't find referenced class org.apache.commons.codec.binary.Base64
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.signature.OAuthMessageSigner: can't find referenced class org.apache.commons.codec.binary.Base64
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.signature.OAuthMessageSigner: can't find referenced class org.apache.commons.codec.binary.Base64
[2013-06-06 18:32:00 - Explosionfilters] Warning: oauth.signpost.signature.OAuthMessageSigner: can't find referenced class org.apache.commons.codec.binary.Base64
[2013-06-06 18:32:00 - Explosionfilters]       You should check if you need to specify additional program jars.
[2013-06-06 18:32:00 - Explosionfilters] Warning: there were 31 unresolved references to classes or interfaces.
[2013-06-06 18:32:00 - Explosionfilters]          You may need to specify additional library jars (using '-libraryjars').
[2013-06-06 18:32:00 - Explosionfilters] java.io.IOException: Please correct the above warnings first.
[2013-06-06 18:32:00 - Explosionfilters]    at proguard.Initializer.execute(Initializer.java:321)
[2013-06-06 18:32:00 - Explosionfilters]    at proguard.ProGuard.initialize(ProGuard.java:211)
[2013-06-06 18:32:00 - Explosionfilters]    at proguard.ProGuard.execute(ProGuard.java:86)
[2013-06-06 18:32:00 - Explosionfilters]    at proguard.ProGuard.main(ProGuard.java:492)
    please help me how to solve this issue

