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2427. Number of Common Factors

Difficulty Topics

Description

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

Solution

number-of-common-factors.py
class Solution:
    def commonFactors(self, a: int, b: int) -> int:
        res = 0

        for x in range(1, min(a, b) + 1):
            if a % x == 0 and b % x == 0:
                res += 1

        return res