#include <bits/stdc++.h>
using namespace std;

int main() {
	int N;
	cin >> N;
	set<int> D;
	for( int d = 1; d*d <= N; d++ ) {
		if( N%d == 0 ) D.insert(d), D.insert(N/d);
	}
	cout << N-int(D.size()) << endl;
}