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)
x = 0

while ary[0] <= ary[1] do
    if (ary[2] % ary[0] == 0) then
        x = x + 1
    end
    ary[0] = ary[0] + 1
end
puts x