public static void main ( String [ ] args ) throws IOException {
  final String s ;
  try ( BufferedReader reader = new BufferedReader ( new InputStreamReader ( System . in ) ) ) {
    s = reader . readLine ( ) ;
  }
  PrintWriter out = new PrintWriter ( System . out ) ;
  final String [ ] sl = s . split ( " " ) ;
  int N = Integer . parseInt ( sl [ 0 ] ) ;
  int M = Integer . parseInt ( sl [ 1 ] ) ;
  ArrayList < Pair > div = new ArrayList < > ( ) ;
  divisor ( div , M ) ;
  long MAX = M / N + 1 ;
  long ans = 0 ;
  for ( Pair p : div ) {
    long first = p . first ;
    long second = p . second ;
    if ( first < MAX && ans < first ) ans = first ;
    if ( second < MAX && ans < second ) ans = second ;
  }
  out . println ( ans ) ;
  out . flush ( ) ;
}

public static void main ( String [ ] args ) throws IOException { final String s ; try ( BufferedReader reader = new BufferedReader ( new InputStreamReader ( System . in ) ) ) { s = reader . readLine ( ) ; } PrintWriter out = new PrintWriter ( System . out ) ; final String [ ] sl = s . split ( " ▁ " ) ; int N = Integer . parseInt ( sl [ 0 ] ) ; int M = Integer . parseInt ( sl [ 1 ] ) ; ArrayList < Pair > div = new ArrayList < > ( ) ; divisor ( div , M ) ; long MAX = M / N + 1 ; long ans = 0 ; for ( Pair p : div ) { long first = p . first ; long second = p . second ; if ( first < MAX && ans < first ) ans = first ; if ( second < MAX && ans < second ) ans = second ; } out . println ( ans ) ; out . flush ( ) ; }
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