import java.util.Scanner;
public class Main
{
  	public static void main(String[] args)
    {
     	Scanner sc = new Scanner(System.in);
      	int a = sc.nextInt();
      	long result = 0;
      	for(int i = 1; i <= a; i++)
      	{
      		for(int j = i; j <= a; j++)
      		{
      			for(int k = j; k <= a; k++)
      			{
      				boolean judge = true;
      				for(int l = i; l > 0 && judge; l--)
      				{
      					if(i % l == 0 && j % l == 0 && k % l == 0)
      					{
      						judge = false;
      						if(i == j && j == k)
                            {
                             	result += l; 
                            }else if(i != j && j != k && i != k){
                              	result += (l * 6);
                            }else{
                              	result += (l * 3);
                            }
                              
      					}
      				}
      			}
      		}
      	}
      	
      	System.out.println(result);
    }
}

/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