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Java Solution for LeetCode algorithm problems, continually updating
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2427\. Number of Common Factors
Easy
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 = 6
**Output:** 4
**Explanation:** The common factors of 12 and 6 are 1, 2, 3, 6.
**Example 2:**
**Input:** a = 25, b = 30
**Output:** 2
**Explanation:** The common factors of 25 and 30 are 1, 5.
**Constraints:**
* `1 <= a, b <= 1000`