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,b,c=gets.split.map(&:to_i);div=[]
c.times{|i|div<< i+1 if(c%(i+1))==0}
puts div.delete_if{|i|i<a||b<i}.size