#include <iostream>
#include <string>

using namespace std;

int main()
{
	int n;
	while(cin>>n)
	{
		int ans=0;
		for(int i=2;i*i<=n;i++)
		{
			while(n%i==0)
			{
				ans++;
				n=n/i;
			}
		}
		if(n>1) ans++;
		cout<<ans<<endl;
	}
	return 0;
}