public static int sumofFactors ( int n ) {
  if ( n % 2 != 0 ) return 0 ;
  int res = 1 ;
  for ( int i = 2 ;
  i <= Math . sqrt ( n ) ;
  i ++ ) {
    int count = 0 , curr_sum = 1 ;
    int curr_term = 1 ;
    while ( n % i == 0 ) {
      count ++ ;
      n = n / i ;
      if ( i == 2 && count == 1 ) curr_sum = 0 ;
      curr_term *= i ;
      curr_sum += curr_term ;
    }
    res *= curr_sum ;
  }
  if ( n >= 2 ) res *= ( 1 + n ) ;
  return res ;
}

public static int sumofFactors ( int n ) { if ( n % 2 != 0 ) return 0 ; int res = 1 ; for ( int i = 2 ; i <= Math . sqrt ( n ) ; i ++ ) { int count = 0 , curr_sum = 1 ; int curr_term = 1 ; while ( n % i == 0 ) { count ++ ; n = n / i ; if ( i == 2 && count == 1 ) curr_sum = 0 ; curr_term *= i ; curr_sum += curr_term ; } res *= curr_sum ; } if ( n >= 2 ) res *= ( 1 + n ) ; return res ; }
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