func_code_string: #include <bits/stdc++.h>   using namespace std;   int l, r, x, y;   vector<int> primes;   int cnt(int idx, int a, int b) {     if (idx == primes.size()) return a >= l && a <= r && b >= l && b <= r;     return cnt(idx + 1, a * primes[idx], b) + cnt(idx + 1, a, b * primes[idx]);   }   int main() {     cin >> l >> r >> x >> y;     if (y % x) return puts( 0 );     y /= x;     for (int i = 2; i * i <= y; i++) {       int v = 1;       while (y % i == 0) y /= i, v *= i;       if (v > 1) primes.push_back(v);     }     if (y > 1) primes.push_back(y);     cout << cnt(0, x, x);   }   