#include <bits/stdc++.h>
using namespace std;
bool sortbysec(const pair<int, int> &a, const pair<int, int> &b) {
  return (a.second < b.second);
}
int main() {
  int q;
  cin >> q;
  while (q--) {
    int n;
    cin >> n;
    vector<int> a(4 * n);
    for (int i = 0; i < 4 * n; i++) cin >> a[i];
    sort(a.begin(), a.end());
    int area = a[0] * a[4 * n - 1];
    int temp = 0;
    for (int i = 1; i <= n; i++) {
      if ((a[2 * i - 2] != a[2 * i - 1]) ||
          (a[4 * n - 2 * i] != a[4 * n - 2 * i + 1]) ||
          (a[2 * i - 1 - 1] * a[4 * n - 2 * i + 1] != area)) {
        temp = 1;
        break;
      }
    }
    if (temp == 0) {
      cout << "YES" << endl;
    } else
      cout << "NO" << endl;
  }
  return 0;
}
