The GCD function
Practice
3.5 (52 votes)
Mathematics
Gcd
Math
Number theory
Problem
94% Success 9122 Attempts 20 Points 1s Time Limit 256MB Memory 1024 KB Max Code

You are given an integer \(N\) and there is a function \(F(N)=\sum_{i=1}^{N} GCD(X,i)\). Here, GCD denotes the greatest common divisor. You are required to select an integer value \(X\) that is greater than or equal to 1

Your task is to determine the following:

  • The maximum possible value of \(F(N)\) that you can get 
  • The minimum \(X\) for which maximum value will be achieved

Input format

  • The first line contains an integer \(T\) denoting the number of test cases.
  • Next \(T\) lines contain a single integer \(N\).

Output format

Print \(T\) lines. For each test case:

  • Print a single line containing two integers, the maximum value of \(F(N)\) and the minimum value of \(X\) for which \(F(N)\) is maximized.

Constraints

\(1 \leq T \leq 40\)

\(1 \leq N \leq 40\)

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