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 = gets.split(' ')
a[0] = a[0].to_i
a[1] = a[1].to_i
a[2] = a[2].to_i
count = 0
for i in a[0]..a[1] do
    if (a[2] % i == 0)
        count += 1
    end
end
puts(count)