Quote from Arti on Fri, July 16, 2021, 6:24 am

Perfect number is a positive integer which is equal to the sum of its proper divisors ( all factors including "1" but excluding itself ).

The smallest perfect number is "6".

We know that:-  6 = 1×2×3,

Then sum of factors ( 1+ 2 +3 ) = 6.

Other perfect numbers are 28, 496, 8128, etc

 

Quote from BALKRISHAN on Tue, July 27, 2021, 4:26 am

Perfect no:-Sum of all the possible factors of a given no is equal to twice the no is called a Perfect no.

Ex:--   6 ( All possible factors of 6 are-1,2,3,6 )

Sum of factors = 1+2+3+6 =12

&Twice the no = 2×6 =12

Here , Sum of factors = Twice the no =12

So, 6 is perfect no.