import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner a =  new Scanner(System.in);
        int h = a.nextInt();
        int ans = 0;
        for(int i = 1; i <= h; i++){
            for(int j = 1; j <= h; j++){
                for(int k = 1; k <= h; k++){
                    int temp = gcd(i,j);
                    ans+=gcd(temp,k);
                }
            }
        }
        
        System.out.println(ans);
    }
    
    static int gcd(int x, int y){
        if(y == 0)return x;
        else{
            return gcd(y, x%y);
        }
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz