The number 30 is a semiperfect number — one that is equal to the sum of some, but not all, of its factors.The number 30 is a semiperfect number — one that is equal to the sum of some, but not all, of its factors.
The number 30 is a semiperfect number — one that is equal to the sum of some, but not all, of its factors.The number 30 is a semiperfect number — one that is equal to the sum of some, but not all, of its factors.