#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <cmath>
#include <queue>
#include <numeric>
#include <bitset>

using namespace std;
#define repp(i,a,b) for(int i = (int)(a) ; i < (int)(b) ; ++i)
#define reppe(i,a,b) for(int i = (int)(a) ; i <= (int)(b) ; ++i)
#define repm(i,a,b) for(int i = (int)(a) ; i > (int)(b) ; --i)
#define repme(i,a,b) for(int i = (int)(a) ; i >= (int)(b) ; --i)

typedef long long ll;

long long GCD(long long a, long long b){if(b==0)return a;return GCD(b,a%b);}

int main() {
    int K; cin >> K;
    long long res = 0;
    repp(i,1,K+1) {
        repp(j,1,K+1) {
            repp(k,1,K+1) {
                res+=GCD(GCD(i,j),k);
            }
        }
    }
    cout << res << endl;
}
