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)
ary = []
cnt = 0
c.times do |i|
	if c % (i+1) == 0
		ary.push(i+1)
	end
end
ary.each do |num|
	if num >= a && num <= b
		cnt += 1
	end
end
puts cnt