public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  long K = sc . nextLong ( ) ;
  divs = new ArrayList < > ( ) ;
  for ( int i = 1 ;
  i * i <= N ;
  ++ i ) {
    if ( N % i == 0 ) {
      divs . add ( i ) ;
      if ( i * i != N ) {
        divs . add ( N / i ) ;
      }
    }
  }
  Collections . sort ( divs ) ;
  HashMap < Integer , Long > dp = new HashMap < > ( ) ;
  for ( int d : divs ) {
    dp . put ( d , pow ( K , ( d + 1 ) / 2 ) ) ;
    for ( int i = 0 ;
    divs . get ( i ) < d ;
    ++ i ) {
      if ( d % divs . get ( i ) == 0 ) dp . put ( d , ( dp . get ( d ) - dp . get ( divs . get ( i ) ) + MODULO ) % MODULO ) ;
    }
  }
  long ans = 0 ;
  for ( int d : divs ) {
    ans = ( ans + dp . get ( d ) * ( d % 2 == 0 ? d / 2 : d ) ) % MODULO ;
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; long K = sc . nextLong ( ) ; divs = new ArrayList < > ( ) ; for ( int i = 1 ; i * i <= N ; ++ i ) { if ( N % i == 0 ) { divs . add ( i ) ; if ( i * i != N ) { divs . add ( N / i ) ; } } } Collections . sort ( divs ) ; HashMap < Integer , Long > dp = new HashMap < > ( ) ; for ( int d : divs ) { dp . put ( d , pow ( K , ( d + 1 ) / 2 ) ) ; for ( int i = 0 ; divs . get ( i ) < d ; ++ i ) { if ( d % divs . get ( i ) == 0 ) dp . put ( d , ( dp . get ( d ) - dp . get ( divs . get ( i ) ) + MODULO ) % MODULO ) ; } } long ans = 0 ; for ( int d : divs ) { ans = ( ans + dp . get ( d ) * ( d % 2 == 0 ? d / 2 : d ) ) % MODULO ; } System . out . println ( ans ) ; }
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