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内存限制：512 MB 时间限制：1 S 标准输入输出

题目类型：传统评测方式：文本比较

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.

Three integers a, b and c are given in a line separated by a single space.

Print the number of divisors in a line.

5 14 80

1 ≤ a, b, c ≤ 10000

a ≤ b