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Home > Online Math Calculator > General Math > Perfect Number Validator
In mathematics, a perfect number is defined as an integer which is the sum of its proper positive divisors, that is,
the sum of the positive divisors not including the number. Equivalently, a perfect number is a number that is half the
sum of all of its positive divisors, or σ(n) = 2 n.
The first perfect number is 6, because 1, 2 and 3 are its proper positive divisors and 1 + 2 + 3 = 6. The next perfect number is 28 = 1 + 2 + 4 + 7 + 14. The next perfect numbers are 496 and 8128 and so on. Source Wikipedia
The Perfect Number Validator will tell you if the number you have inputed is perfect or not!