LeetCode-in-Java
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
Solution
public class Solution {
public int commonFactors(int a, int b) {
int ans = 0;
for (int i = 1; i <= Math.min(a, b); i++) {
if (a % i == 0 && b % i == 0) {
ans++;
}
}
return ans;
}
}