#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353; //1000000007;
using ll=long long;
using pp=pair<int,int>;
#define sr string 
#define vc vector
#define fi first
#define se second
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define pque priority_queue
#define bpc(a) __builtin_popcount(a)
bool f(ll a){
	ll wa=0,ac=1e9;
	while(ac-wa>1){
		ll x=(ac+wa)/2;
		if(x*x>=a)ac=x;
		else wa=x;
	}
	if(ac*ac==a)return true;
	else return false;
}
int main(){
	int t;cin>>t;
	rep(z,t){
		int n;cin>>n;
		vc<ll>v(n); rep(i,n)cin>>v[i];
		rep(i,n)rep(j,i){
			ll g=gcd(v[i],v[j]);
			v[i]/=g,v[j]/=g;
		}
		bool ok=true; rep(i,n)if(!f(v[i]))ok=false;
		if(ok)cout<<"Yes";
		else cout<<"No";
		cout<<"\n";
	}
}