import sys
input = sys.stdin.readline
from math import gcd

def is_sqrt(n):
    yes = 0
    no = 10 ** 9 + 5
    while no - yes != 1:
        mid = (yes + no)//2
        if n >= mid * mid:
            yes = mid
        else:
            no = mid
            
    return n == yes * yes
    

T = int(input())
for _ in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    for i in range(N):
        for j in range(i + 1, N):
            g = gcd(A[i], A[j])
            A[i] //= g
            A[j] //= g
            
    ans = 1
    for a in A:
        ans &= is_sqrt(a)
    print("Yes") if ans else print("No")