static int sumFactors ( int arr [ ] , int n ) {
  sieve ( ) ;
  Map map = new HashMap ( ) ;
  for ( int i = 0 ;
  i < MAXN ;
  ++ i ) map . put ( i , 0 ) ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) map . put ( arr [ i ] , 1 ) ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) {
    int num = arr [ i ] ;
    while ( num != 1 && ( int ) ( map . get ( spf [ num ] ) ) == 1 ) {
      num /= spf [ num ] ;
    }
    if ( num == 1 ) sum += arr [ i ] ;
  }
  return sum ;
}

static int sumFactors ( int arr [ ] , int n ) { sieve ( ) ; Map map = new HashMap ( ) ; for ( int i = 0 ; i < MAXN ; ++ i ) map . put ( i , 0 ) ; for ( int i = 0 ; i < n ; ++ i ) map . put ( arr [ i ] , 1 ) ; int sum = 0 ; for ( int i = 0 ; i < n ; ++ i ) { int num = arr [ i ] ; while ( num != 1 && ( int ) ( map . get ( spf [ num ] ) ) == 1 ) { num /= spf [ num ] ; } if ( num == 1 ) sum += arr [ i ] ; } return sum ; }
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