SP12933 NDIV - n-divisors

We all know about prime numbers, prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. We can Classify the numbers by its number of divisors, as n-divisors-numbers, for example number 1 is 1-divisor number, number 4 is 3-divisors-number... etc. **Note**: All prime numbers are 2-divisors numbers. **Example:** 8 is a 4-divisors-number \[1, 2, 4, 8\].

Three integers a, b, n.

Print single line the number of n-divisors numbers between a and b inclusive.