public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  long n = sc . nextLong ( ) , k = sc . nextLong ( ) ;
  long [ ] divs = divs ( n ) ;
  int nd = divs . length ;
  long mod = 1000000007 ;
  HashMap < Long , Long > map = new HashMap < > ( ) ;
  long res = 0 ;
  for ( int i = 0 ;
  i < nd ;
  i ++ ) {
    long div = divs [ i ] ;
    long [ ] dd = divs ( div ) ;
    long nama = modPow ( k , ( div + 1 ) / 2 , mod ) ;
    for ( int j = 0 ;
    j < dd . length - 1 ;
    j ++ ) {
      nama = ( nama - map . get ( dd [ j ] ) + mod ) % mod ;
    }
    map . put ( div , nama ) ;
    long coef = ( div % 2 == 1 ? div : div / 2 ) ;
    res = ( res + nama * coef % mod ) % mod ;
  }
  System . out . println ( res ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; long n = sc . nextLong ( ) , k = sc . nextLong ( ) ; long [ ] divs = divs ( n ) ; int nd = divs . length ; long mod = 1000000007 ; HashMap < Long , Long > map = new HashMap < > ( ) ; long res = 0 ; for ( int i = 0 ; i < nd ; i ++ ) { long div = divs [ i ] ; long [ ] dd = divs ( div ) ; long nama = modPow ( k , ( div + 1 ) / 2 , mod ) ; for ( int j = 0 ; j < dd . length - 1 ; j ++ ) { nama = ( nama - map . get ( dd [ j ] ) + mod ) % mod ; } map . put ( div , nama ) ; long coef = ( div % 2 == 1 ? div : div / 2 ) ; res = ( res + nama * coef % mod ) % mod ; } System . out . println ( res ) ; }
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