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)

num = gets.chomp.split.map{|num| num.to_i}
 sum = 0
 x = num[0]
while  x <= num[1]
  if   num[2] % x == 0
    sum += 1
  end
  x += 1
end
p sum