#include <bits/stdc++.h>
using namespace std;
int main(){
  int T;
  cin >> T;
  for (int i = 0; i < T; i++){
    int N;
    cin >> N;
    vector<long long> A(N);
    for (int j = 0; j < N; j++){
      cin >> A[j];
    }
    for (int j = 0; j < N; j++){
      for (int k = j + 1; k < N; k++){
        long long g = gcd(A[j], A[k]);
        A[j] /= g;
        A[k] /= g;
      }
    }
    bool ok = true;
    for (int j = 0; j < N; j++){
      int tv = 1, fv = 1000000001;
      while (fv - tv > 1){
        int mid = (tv + fv) / 2;
        if ((long long) mid * mid <= A[j]){
          tv = mid;
        } else {
          fv = mid;
        }
      }
      if ((long long) tv * tv != A[j]){
        ok = false;
      }
    }
    if (ok){
      cout << "Yes" << endl;
    } else {
      cout << "No" << endl;
    }
  }
}