#include <fstream>

using namespace std;

ifstream in("fractii.in");
ofstream out("fractii.out");
unsigned int nr;
int main(void)
{
    unsigned int N;
    in>>N;
    for(unsigned int i=1;i<=N;i++)for(unsigned int j=1;j<=N;j++){
                 if(i==1 || j==1)nr++;
                 else for(unsigned int x=2;x<=i;x++)if(i%x==0 && j%x!=0)nr++;
                 else nr++;}
    out<<nr;
    return 0;}