Kth Largest factor of N Problem (TCS Codevita)

Kth Largest factor Of N Problem 

Kth Largest factor Of N Problem is one of the problem that was asked in previous year TCS Codevita Exam. Here in this problem two positive integers N and K are given. You have to find the kth largest factor of N.

kth Largest factor of N

Problem Description

A positive integer d is said to be a factor of another positive integer N if when N is divided by d, the remainder obtained is zero. For example, for number 12, there are 6 factors 1, 2, 3, 4, 6, 12. Every positive integer k has at least two factors, 1 and the number k itself.Given two positive integers N and k, write a program to print the kth largest factor of N.

Input Format:

  • The input is a comma-separated list of positive integer pairs (N, k)

Output Format:

  • The kth highest factor of N. If N does not have k factors, the output should be 1.

Constraints:

  • 1<N<10000000000.
  • 1<k<600.
  • You can assume that N will have no prime factors which are larger than 13.

Example 1

  • Input: 12,3
  • Output: 4

Explanation: N is 12, k is 3. The factors of 12 are (1,2,3,4,6,12). The highest factor is 12 and the third largest factor is 4. The output must be 4

Example 2

  • Input: 30,9
  • Output: 1

Explanation: N is 30, k is 9. The factors of 30 are (1,2,3,5,6,10,15,30). There are only 8 factors. As k is more than the number of factors, the output is 1.

Solution for kth Largest factor of N Problem