#include<iostream.h>
#include<fstream.h>
int p,q,nr=0,n;
ifstream f("intrare.in");
ofstream g("fractii.out");
int main()
{   f>>n;
	for(p=1;p<=n;p++)
	for(q=1;q<=n;q++)
		{if(p%q!=0) nr++;}
g<<nr;
return 0;
}