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
MATHEMATICA
Divisors[220] (* Alonso del Arte, Oct 22 2017 *)
PROG
(PARI) divisors(220) \\ Charles R Greathouse IV, Jun 22 2017
CROSSREFS
KEYWORD
nonn,fini,full,easy
AUTHOR
STATUS
approved