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

Author

R. J. Mathar, Nov 04 2010

Keywords

• nonn

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)

Crossrefs

Cf. A005101, A141545-A141547, A181601.

Programs

Mathematica

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

PARI

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

Formula

{n: A033880(n) = 32}.

Extensions

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

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