static int Nfactors ( int a , int b , int n ) {
  segmentedSieve ( ) ;
  int result = 0 ;
  for ( int i = a ;
  i <= b ;
  i ++ ) {
    int tmp = ( int ) Math . sqrt ( i ) , copy = i ;
    int count = 0 ;
    for ( int j = 0 ;
    primes . get ( j ) <= tmp ;
    j ++ ) {
      if ( copy % primes . get ( j ) == 0 ) {
        count ++ ;
        while ( copy % primes . get ( j ) == 0 ) copy = copy / primes . get ( j ) ;
      }
    }
    if ( copy != 1 ) count ++ ;
    if ( count == n ) result ++ ;
  }
  return result ;
}

static int Nfactors ( int a , int b , int n ) { segmentedSieve ( ) ; int result = 0 ; for ( int i = a ; i <= b ; i ++ ) { int tmp = ( int ) Math . sqrt ( i ) , copy = i ; int count = 0 ; for ( int j = 0 ; primes . get ( j ) <= tmp ; j ++ ) { if ( copy % primes . get ( j ) == 0 ) { count ++ ; while ( copy % primes . get ( j ) == 0 ) copy = copy / primes . get ( j ) ; } } if ( copy != 1 ) count ++ ; if ( count == n ) result ++ ; } return result ; }
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