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

namespace ITP1
{
    class ITP1_3_D
    {
        static void Main(string[] args)
        {
            int a, b, c;
            int divisor_count = 0;

            List<int> dataSet = Console.ReadLine().Split().Select(int.Parse).ToList();

            a = dataSet[0];
            b = dataSet[1];
            c = dataSet[2];

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

            Console.WriteLine(divisor_count);
        }
    }
}

