Allow me to explain what a perfect number is. There are 3 types of NATURAL numbers (natural numbers are like 1, 2, 3, …): Abundant, deficient, and perfect.
So, you take a number, like 12, and you add all of its divisors that are smaller than it.
For 12, that's 1,2,3,4,6.
Then add:
1+2+3+4+6=16
16>12, so,12 is an abundant number.
If it adds to less, then it is a deficient number, like 8
Divisors:1,2,4
1+2+4=7, 7<8, 8 is a deficient number.
Then there are the exteremely rare perfect numbers, like 6.
Divisors: 1,2,3
1+2+3=6
There are only thirty or so known perfect numbers, so they are rare indeed.
Anyway, hope you enjoyed this mini math lesson."