#include <iostream>
int main(){
	long long n, ans = 1000000000; std::cin >> n;
	for(int a = 1; a <= n; ++a)
		if(n%a==0)
			for(long long b = 1; b<=n; ++b){
				int c = n/(a*b);
				if(a*b*c==n)
					ans = std::min(ans, 2*(a*b+b*c+c*a));
			}
	std::cout << ans << "\n";
}