Question: 2 prime numbers that have a sum of 28?
Answer: The sum of the two distinct prime factors of 28, is 2 + 7 = 9. The sum of the divisors of 28 excluding itself, is 1+2+4+7+14 = 28. The sum of all divisors of 28, is 1+2+4+7+14+28 = 56.