👉 In mathematics, a perfect number is a positive integer that is equal to the sum of its proper divisors (excluding itself). For example, 6 is a perfect number because 1 + 2 + 3 = 6. Perfect numbers are important in number theory and algebraic number theory as they serve as examples for what can be defined using integers. Perfect numbers are also known as Mersenne primes, after the mathematician Marin Mersenne who first considered them. They include the
