include[HTML_REMOVED]
using namespace std;
typedef long long ll;
ll n,cnt=0;
int main()
{
cin>>n;
for(ll i=2;i*i<=n;i)
if(n%i==0)
{
cnt;
while(n%i==0)
n/=i;
}
if(n!=1) cnt++;
cout<<cnt;
return 0;
}