#include <iostream>
#include <fstream>
int n,i,j;
int main(){
std::ifstream in("fractii.in");
std::ofstream out("fractii.out");
in>>n;
for (i=1;i<=n;i++)
 for (j=1;j<=n;j++)
  if (i%j==0) ++nr;
out>>nr;
}