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A091193 Smallest number having n abundant divisors. 3
1, 12, 24, 36, 60, 72, 168, 120, 180, 288, 240, 432, 504, 360, 864, 1296, 960, 840, 720, 1080, 3456, 1800, 2016, 1440, 1680, 3024, 2160, 3780, 2880, 2520, 5280, 3360, 6048, 4320, 6480, 22440, 11340, 7200, 6720, 7920, 5040, 10800, 7560, 12960, 18900, 13440 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

A080224(a(n))=n and A080224(m)<>n for m<a(n).

LINKS

Amiram Eldar, Table of n, a(n) for n = 0..1000

Eric Weisstein's World of Mathematics, Abundant Number.

MATHEMATICA

numd[n_] := Length@Select[Divisors[n], DivisorSigma[1, #] > 2 # &]; m = 100; s =

Table[0, {m}]; n = 1; c = 0; While[c < m, k = numd[n]; If[k > 0 && k <= m && s[[k]] == 0, s[[k]] = n; c++]; n++]; s (* Amiram Eldar, Jun 24 2019 *)

CROSSREFS

Cf. A080224.

Sequence in context: A117304 A022759 A335540 * A335541 A174018 A098242

Adjacent sequences:  A091190 A091191 A091192 * A091194 A091195 A091196

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 27 2003

EXTENSIONS

More terms from Reinhard Zumkeller, Dec 12 2009

STATUS

approved

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Last modified July 15 23:32 EDT 2020. Contains 335774 sequences. (Running on oeis4.)