+A **perfect number** is a positive [integer](/wiki/integer) that is equal to the sum of its positive [divisors](/wiki/divisor), excluding the number itself. These rare numbers embody a unique mathematical harmony, reflecting an ancient fascination with the properties of arithmetic.
+## See also
+- [Abundant Numbers](/wiki/abundant_numbers)
+- [Deficient Numbers](/wiki/deficient_numbers)
+- [Mersenne Primes](/wiki/mersenne_primes)