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)

ary = gets.split.map(&:to_i)
count = 0
a = ary[0]
while a <= ary[1]
	if ary[2] % a  == 0
		count += 1
	end
	a +=1
end
puts count