**The first/smallest perfect number is 6**.

Its proper divisors are 1, 2, and 3, and 1 + 2 + 3 = 6. The number 6 is equal to half the sum of all its positive divisors: (1+2+3+6)/2=6.

Note-- The next perfect number is 28--> 28=1+2+4+7+14. This is followed by 496 and 8128