public static Vector < Integer > divisors ( int n ) {
  Vector < Integer > v = new Vector < > ( ) ;
  int i = 1 ;
  while ( i * i <= n ) {
    if ( n % i == 0 ) {
      if ( n / i == i ) {
        v . add ( i ) ;
      }
      else {
        v . add ( i ) ;
        v . add ( n / i ) ;
      }
    }
    i ++ ;
  }
  return v ;
}

public static Vector < Integer > divisors ( int n ) { Vector < Integer > v = new Vector < > ( ) ; int i = 1 ; while ( i * i <= n ) { if ( n % i == 0 ) { if ( n / i == i ) { v . add ( i ) ; } else { v . add ( i ) ; v . add ( n / i ) ; } } i ++ ; } return v ; }
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