import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
from math import gcd

def f(x):
    ok = 0
    ng = 10**9+1
    while ng-ok > 1:
        d = ok+ng>>1
        if d*d <= x:
            ok = d
        else:
            ng = d
    return ok*ok == x

for _ in range(ni()):
    n = ni()
    a = na()
    for i in range(n):
        for j in range(i+1,n):
            g = gcd(a[i],a[j])
            a[i] //= g
            a[j] //= g

    ok = 1
    for i in range(n):
        if not f(a[i]):
            ok = 0
            break
    if ok:
        Yes()
    else:
        No()