func_code_string: #include <bits/stdc++.h>   using namespace std;   unsigned long long l, r, x, y;   unsigned long long gcd(unsigned long long a, unsigned long long b) {     while (b > 0) {       unsigned long long t = b;       b = a % b;       a = t;     }     return a;   }   int main() {     cin >> l >> r >> x >> y;     if (x == y) {       if (x >= l && x <= r) {         cout << 1;         return 0;       }     }     unsigned long long number = 0;     l = 1 + ((l - 1) / x);     l *= x;     for (unsigned long long i = l; i * i <= x * y; i += x) {       unsigned long long p = x * y / i;       if (p * i == x * y && p >= l && p <= r && i <= r) {         if (gcd(p, i) == x) {           number += 2;           if (i == p) number--;         }       }     }     cout << number;   }   