#include <bits/stdc++.h>

using namespace std;
int n = 9;
const int INF = 0x3f3f3f3f;
int res = INF, a1, b1, c1;
int main() {
    int a, b, c;
    for (int a = 1; a * a * a <= n; a++) {
        for (int b = a; a * b * b <= n; b++) {
            int c = n / a / b;
            if(a*b*c==n){
                if(2*c-2*a<res){
                    res = 2 * c - 2 * a;
                    a1 = a, b1 = b, c1 = c;
                }
            }
        }
    }
    int ans = (a1 * b1 + a1 * c1 + b1 * c1) * 2;
    cout << ans << endl;
    return 0;
}