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A273016
Ramanujan's largely composite numbers having 5 as the greatest prime divisor.
6
10, 20, 30, 60, 90, 120, 180, 240, 360, 480, 540, 600, 720, 1080, 1440, 2160, 4320
OFFSET
1,1
COMMENTS
By the theorem in comment in A273015, the sequence is finite.
MATHEMATICA
a = {}; b = {0}; Do[If[# >= Max@ b, AppendTo[a, k] && AppendTo[b, #]] &@ DivisorSigma[0, k], {k, 10^7}]; Select[a, FactorInteger[#][[-1, 1]] == 5 &] (* Michael De Vlieger, May 13 2016 *)
CROSSREFS
Sequence in context: A135557 A093037 A355695 * A269238 A279420 A274051
KEYWORD
nonn,fini,full
AUTHOR
STATUS
approved