#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int t; cin >> t;
    while (t--) {
        int n; cin >> n;
        vector<long long> a(n);
        for (int i = 0; i < n; i++) {
            cin >> a[i];
            for (int j = 0; j < i; j++) {
                long long g = __gcd(a[i], a[j]);
                a[i] /= g; a[j] /= g;
            }
        }
        bool ok = true;
        for (int i = 0; i < n; i++) {
            int x = round(sqrt(a[i]));
            if (1LL * x * x != a[i]) {
                ok = false;
            }
        }
        cout << (ok ? "Yes\n" : "No\n");
    }
}