#include <iostream>
#include <vector>
using namespace std;

int dp[51];

int main(void)
{

	int n;
	while(cin >> n, !cin.eof()){

		for(int i = 1; i <= n; i++){
			for(int j = 1; i * j <= 50; j++)
				dp[i*j]++;
		}

		cout << dp[n] << endl;

	}


	return 0;
}