#include <bits/stdc++.h>
using namespace std;
long long n, a[100069];
int main() {
  long long t, rr, i;
  bool bad;
  scanf("%lld", &t);
  for (rr = 0; rr < t; rr++) {
    scanf("%lld", &n);
    for (i = 1; i <= n * 4; i++) {
      scanf("%lld", a + i);
    }
    sort(a + 1, a + n * 4 + 1);
    bad = 0;
    for (i = 1; i <= n * 4; i += 2) {
      if (a[i] != a[i + 1]) {
        bad = 1;
        break;
      }
    }
    for (i = 3; i <= n * 2; i += 2) {
      if (a[i] * a[n * 4 + 1 - i] != a[1] * a[n * 4]) {
        bad = 1;
        break;
      }
    }
    if (bad) {
      printf("NO\n");
    } else {
      printf("YES\n");
    }
  }
}
