#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<stack>
#include<deque>
#include<set>
#include<map>
#include<vector>
#include<string.h>
using namespace std;
typedef long long LL;
const int MAXN=1e5+10;

int main()
{
    ios::sync_with_stdio(0),cin.tie(0);
    int n;
    while(cin>>n){
        int sum=0;
        for(int i=2;i<=n;i++){
            while(n%i==0){
                sum++;
                n/=i;
            }
        }
        cout<<sum<<endl;
    }
    return 0;

}