A175989 Numbers with abundance 32.

572, 992, 7544, 10184, 28544, 83312, 113072, 122624, 382772, 507392, 537248, 698528, 791264, 1081568, 1279136, 2154584, 2279072, 5029184, 15126992, 29581424, 74899952, 89245784, 95327216, 307801856, 623799776, 712023296, 903230984, 1734487184, 9210347984

Offset

1,1

Comments

a(74) > 10^18. - Hiroaki Yamanouchi, Aug 23 2018

Links

Hiroaki Yamanouchi, Table of n, a(n) for n = 1..73 (first 47 terms from Giovanni Resta)

Formula

{n: A033880(n) = 32}.

Mathematica

Select[Range[10000000], DivisorSigma[1, #]-2#==32&] (* Harvey P. Dale, Dec 10 2010 *)

Prog

(PARI) is(n)=sigma(n)==2*n+32 \\ Charles R Greathouse IV, Feb 21 2017

Crossrefs

Cf. A005101, A141545-A141547, A181601.

Sequence in context: A178323 A049361 A252633 * A252640 A252641 A360129

Adjacent sequences: A175986 A175987 A175988 * A175990 A175991 A175992

Keyword

nonn

Author

R. J. Mathar, Nov 04 2010

Extensions

Additional terms provided by Harvey P. Dale, Dec 10 2010

a(19)-a(29) from Donovan Johnson, Dec 08 2011

Status

approved