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


namespace manyDiv
{
    class Program
    {
        static void Main(string[] args)
        {
            int a, b, c, count = 0;
            String[] str = Console.ReadLine().Split(' ');
            a = int.Parse(str[0]);
            b = int.Parse(str[1]);
            c = int.Parse(str[2]);
            for (int i = a; i < b; i++) {
                if (c % i == 0) count++;
            }
            Console.WriteLine(count);
        }
    }
}