#include <cmath>

#include <cstdio>

typedef long long ll;

ll judge(ll k)

{

	ll t = (ll)sqrt(k);

	return t * t == k ? t : 0;

}

ll gcd(ll a , ll b)

{

	return b ? gcd(b , a % b) : a;

}

ll calc(ll k)

{

	ll i , t , ans = 0;

	for(i = 1 ; i * i <= k / 2 ; i ++ )

	{

		t = judge(k - i * i);

		if(t && gcd(i , t) == 1) ans ++ ;

	}

	return ans;

}

int main()

{

	ll n , i , ans = 0;

	scanf("%lld" , &n);

	for(i = 1 ; i * i <= 2 * n ; i ++ )

	{

		if(2 * n % i == 0)

		{

			ans += calc(i);

			if(i * i != 2 * n) ans += calc(2 * n / i);

		}

	}

	printf("%lld\n" , ans * 4);

	return 0;

}