Number of Common Factors
Given two positive integers a and b, return the number of common factors of a and b.
An integer x is a common factor of a and b if x divides both a and b.
Example 1
Input
a = 12, b = 6Output
4The common factors of 12 and 6 are 1, 2, 3, and 6.
Example 2
Input
a = 25, b = 30Output
2The common factors of 25 and 30 are 1 and 5.
Constraints
- 1 <= a, b <= 1000