README.md

2427. 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 = 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

Solutions (Rust)

1. Solution

impl Solution {
    pub fn common_factors(a: i32, b: i32) -> i32 {
        (1..=a.min(b)).filter(|x| a % x == 0 && b % x == 0).count() as i32
    }
}