using System;
using System.Collections.Generic;
using System.Text;


namespace ConsoleApplication7
{
    class Program
    {
        static void Main(string[] args)
        {
           

              
                string[] s = Console.ReadLine().Split(' ');

                int a = int.Parse(s[0]);
                int b = int.Parse(s[1]);
                int c = int.Parse(s[2]);

                int n = 0;
                for(int x=a; a<=b; x++)
                {
                     if(c%x==0)
                    {
                       n++;
                     }
               
                 }

                Console.WriteLine(n);
                
            

            
        }
    }
}