import java.util.*;
public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int k = sc.nextInt();
        sc.close();
        int yono = 0;
        for(int a = 1 ; a <= k ; a++){
            for(int b = 1 ; b <= k ; b++){
                for(int c = 1 ; c <= k ; c++){
                    int s = 1;
                    for(int q = 1 ; q <= Math.min(a , Math.min(b , c)) ; q++){
                        if(a % q == 0 && b % q == 0 && c % q == 0){
                            s = q;
                        }
                    }
                    yono += s;
                }
            }
        }
        System.out.println(yono);
    }
}
/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