#include <iostream>
#include <algorithm>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    int n;
    cin >> n;
    int odp = 0;
    for (int i = 1; i <= n; ++i)
        for (int j = 1; j <= n; ++j)
            for (int k = 1; k <= n; ++k)
                odp += __gcd(i, __gcd(j, k));
    cout << odp;
    return 0;
}
