Given a number N, find the even factor sum of the number N.
Example 1:
Input:
N = 30
Output:
48
Explanation:
Even dividers sum 2 + 6 + 10 + 30 = 48
Example 2:
Input:
N = 18
Output:
26
Explanation:
Even dividers sum 2 + 6 + 18 = 26
Your Task:
You don't need to read input or print anything. Your task is to complete the function evenFactors() which takes an integer N as input parameters and returns an integer, number of even factors of N.
Expected Time Complexity: O(sqrt(N)) Expected Space Complexity: O(1)
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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