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
Find the sum of all the numbers of the input vector
Number of digits in an integer
01 - Scalar variables
Beginner's Problem - Squaring
Determine if input is a Narcissistic number
Find the regional maximum value
Big Integer Sqrt
Repeat copies of array elements
Put m balls into n boxes (again)
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