#include <bits/stdc++.h>
using namespace std;
#define ll long long
int main() {
ll n; cin >> n;
int score = 0;
for (int i = 2; i*i <= n; i++) {
while (n % i == 0) {
n /= i;
score++;
}
}
if (n > 1) score++;
cout << score;
}
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