#include <iostream>

using namespace std;
typedef long long ll;
ll gcd(ll a,ll b){
    if(a<b) swap(a,b);
    if(b==0) return a;
    return gcd(a%b,b);
}

bool isSquare(ll x){
    ll le = 0,ri = 1000000000;
    while(ri - le>1){
        ll mid = (le + ri)/2;
        if(mid*mid>=x) ri = mid;
        else le = mid;
    }
    return ri*ri==x;
}

ll a[2010];
int main(){
    int t; cin >> t;
    while(t){
        t--;
        int i,j,n; cin >> n;
        for(i=0;i<n;i++) cin >> a[i];
        for(i=0;i<n;i++){
            for(j=i + 1;j<n;j++){
                ll g = gcd(a[i],a[j]);
                a[i] /= g; a[j] /= g;
            }
        }
        bool f = true;
        for(i=0;i<n;i++){
            if(!isSquare(a[i])) f = false;
        }
        if(f) cout << "Yes\n";
        else cout << "No\n";
    }
}