A018339 Divisors of 220.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220

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

Table of n, a(n) for n=1..12.

Index entries for sequences related to divisors of numbers

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: A376589 A057762 A109511 * A328009 A128216 A299322

Adjacent sequences: A018336 A018337 A018338 * A018340 A018341 A018342

Keyword

nonn,fini,full,easy

Author

N. J. A. Sloane.

Status

approved