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: Wrong Answer)

a,b,c = gets.split.map &:to_i
i = a
cont = 0
while true
  if c%i == 0
    cont += 1
  end
  if i > b
    break
  end
  i += 1
end

puts cont