为啥if加上就AC，不加就60TLE

#include<bits/stdc++.h>
#define int long long
using namespace std;
int t;
int lcm(int x,int y) {
	return x/__gcd(x,y)*y;
}
signed main() {
	cin>>t;
	while(t--) {
		int a,b,c,d;
		cin>>a>>b>>c>>d;
		int e=a/b;
		int f=c/d;
		int ans=0;
		for(int i=1; i*i<=d; i++) {
			if(d%i==0) {//这个
				if(__gcd(i,a)==b&&lcm(i,c)==d) {
					ans++;
				}
				int y=d/i;
				if(y!=i&&__gcd(y,a)==b&&lcm(y,c)==d) {
					ans++;
				}
			}

		}
		cout<<ans<<endl;
	}
}