Problem:
How Many Divisors?

Write a program which reads three integers a, b and c, and prints the number of divisors of c between a and b.

Input

Three integers a, b and c are given in a line separated by a single space.

Output

Print the number of divisors in a line.

Constraints

1 ≤ a, b, c ≤ 10000

a ≤ b

Sample Input 1

5 14 80

Sample Output 1

3

Solution in C# (judge verdict: Accepted)

using System;
using System.Linq;

// 約数の数

public class ITP1_3_D
{
    public static void Main(string[] args)
    {
        //var exStdIn = new System.IO.StreamReader( "input.txt" );
        //System.Console.SetIn( exStdIn );

        int[] input = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
        int a = input[0];
        int b = input[1];
        int c = input[2];

        int count = 0;
        for (int i = a; i <= b; i++)
        {
            if (c % i == 0)
            {
                count++;
            }
        }
        Console.WriteLine(count.ToString());
    }
}