Kth Smallest Factor
Medium Accuracy: 44.45% Submissions: 3375 Points: 4

GIven two positive integers N and K. You have to find the Kth smallest factor of N. A factor of N is a positive integer which divides N. Output the Kth smallest factor of N if it exists otherwise print -1.

 

Example 1:

Input : N = 4 , K = 2
Output: 2
Explanation:
All factors of 4 are 1,2 and 4. Out of
these 2 is the 2nd smallest.

Example 2:

Input : N = 4 , K = 3
Output: 4
Explanation:
All factors of 4 are 1,2 and 4. Out of
these 4 is the 3rd smallest.

 

Your Task:
You don't need to read input or print anything. Your task is to complete the function kThSmallestFactor() which takes 2 Integers N and K as input and returns the answer.

 

Expected Time Complexity: O(sqrt(N))
Expected Auxiliary Space: O(1)

 

Constraints:
1 <= N <= 106
1 <= K <= 106

We are replacing the old Disqus forum with the new Discussions section given below.
Click here to view old Disqus comments.


to report an issue on this page.

Editorial

We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?

Yes

All Submissions

My Submissions:

Login to access your submissions.

Kth Smallest Factor

Output Window