Forge shields from perfect numbers - where sum of divisors equals the number!
A perfect number is a positive integer equal to the sum of its proper divisors (all divisors except itself).
6 = 1 + 2 + 3 ✓ 28 = 1 + 2 + 4 + 7 + 14 ✓
Perfect numbers are rare! The first four are: 6, 28, 496, 8128. All known perfect numbers are even, connected to Mersenne primes by the formula:
2^(p-1) × (2^p - 1) where (2^p - 1) is a Mersenne prime