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 Ruby (judge verdict: Accepted)

a = STDIN.gets.split.map do |i| i.to_i end
cnt = 0
(a[0]..a[1]).each do |i| cnt += 1 if a[2] % i == 0 end
puts cnt