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: Wrong Answer)

num = 0
a,b,c = gets.split(/\s/).map(&:to_i)  
while true
    if a == b
      break
    elsif c%a == 0
      num += 1
      a += 1
    else
      a += 1
      next
    end
  end
puts num