PerfectNumber

PerfectNumber[n] gives the nth perfect number.

Examples

PerfectNumber[1]
(* 6 *)

PerfectNumber[4]
(* 8128 *)

Table[PerfectNumber[n], {n, 1, 5}]
(* {6, 28, 496, 8128, 33550336} *)

Please visit the official Wolfram Language Reference for more details.