import java.util.*;
public class first
{
    public static void main(String[] args)
    {
        Scanner sc= new Scanner(System.in);
        if(!sc.hasNextInt())
        {
           
            System.out.print("Invalid input");
            return; 
        }
        int n=sc.nextInt();
        if(n<2)
        {
            System.out.print("Invalid input");
            return;
        }
        int count=0;
        if(n%i==0)
        {
            count++;
            while(n%i==0)
            {
                n/=2;
            }
            
        }
        for(int i=3;i*i<=n;i+=2)
        {
            if(n%i==0)
            {
                count++;
                while(n%i==0)
                {
                   n/=i;
                }
            }
        }
        if(n>2)
        {
            count++;
        }
        System.out.print(count);
        
    }
}