#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t;
  cin >> t;
  while (t--) {
    long long int a[100000], c, d, e, f, i, j = 0, k, l;
    cin >> c;
    e = 4 * c;
    for (i = 0; i < e; i++) {
      cin >> a[i];
    }
    sort(a, a + e);
    d = a[0] * a[e - 1];
    for (i = 0; i < e; i += 2) {
      f = a[i] * a[e - 1 - i];
      if (f != d || a[i] != a[i + 1]) {
        cout << "NO" << endl;
        j = 1;
        break;
      }
    }
    if (j == 0) cout << "YES" << endl;
  }
  return 0;
}
