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)

input = gets.chomp.split(' ')
a = input[0].to_i
b = input[1].to_i
c = input[2].to_i

i = a
sum = 0

while i <= b
	if c % i == 0 then
		sum += 1
	end
	i += 1
end

puts sum