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 A018339 Divisors of 220. 1
 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This number has twelve divisors that add up to 504, and 504 - 220 = 284, so 220 is an abundant number. In turn, 284 is a deficient number with six divisors (see A018373) which also add up to 504, and 504 - 284 = 220. - Alonso del Arte, Oct 22 2017 LINKS MATHEMATICA Divisors[220] (* Alonso del Arte, Oct 22 2017 *) PROG (PARI) divisors(220) \\ Charles R Greathouse IV, Jun 22 2017 CROSSREFS Cf. A063990, A259180. Sequence in context: A138048 A057762 A109511 * A128216 A080735 A091856 Adjacent sequences:  A018336 A018337 A018338 * A018340 A018341 A018342 KEYWORD nonn,fini,full,easy AUTHOR STATUS approved

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