A perfect number occurs whent the sum of all divisors of a positive integer, except the number itself, equals the number.
28 = 1 + 2 + 4 + 7 + 14;
so return true
10 ~= 1 + 2 + 5
so return false
Least common multiple of many numbers
Back to basics 4 - Search Path
Convert a vector into a number
Given area find sides
Sum the numbers on the main diagonal
Determine if input is a Narcissistic number
Put m balls into n boxes
Big Integer Sqrt
Project Euler: Problem 14 Longest Collatz sequence(harder version)
Return fibonacci sequence do not use loop and condition
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