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A000396
Perfect numbers n: n is equal to the sum of the proper divisors of n.
(Formerly M4186 N1744)
+0
205
6, 28, 496, 8128, 33550336, 8589869056, 137438691328, 2305843008139952128, 2658455991569831744654692615953842176, 191561942608236107294793378084303638130997321548169216
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.
AT&T Labs Research
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