import sys
input = sys.stdin.readline
from collections import *
import random

class Fast_factorize:
    def __init__(self, n):
        self.p = [-1]*(n+1)
        
        for i in range(2, n+1):
            if self.p[i]==-1:
                for j in range(i, n+1, i):
                    if self.p[j]==-1:
                        self.p[j] = i
    
    def factorize(self, n):
        res = []
        
        while n>1:
            res.append(self.p[n])
            n //= self.p[n]
        
        return res

N = int(input())
A = list(map(int, input().split()))
ff = Fast_factorize(10**6+10)
now = defaultdict(int)
cnt = defaultdict(int)
cnt[0] = 1
x = random.sample(range(10**10, 10**18), 10**6+10)
ans = 0

for Ai in A:
    ps = Counter(ff.factorize(Ai))
    
    for k, v in ps.items():
        now[k] ^= v%2
    
    X = 0
    
    for k, v in now.items():
        if v==1:
            X ^= x[k]
    
    ans += cnt[X]
    cnt[X] += 1

print(ans)