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A072824
Sum of aliquot divisors of Ramanujan's highly composite numbers.
1
0, 1, 3, 6, 16, 36, 55, 76, 108, 240, 366, 504, 810, 1698, 2040, 3108, 4272, 6840, 14304, 21240, 29232, 44400, 59088, 74744, 84600, 134688, 152712, 176688, 262440, 360864, 547920, 729216, 922128, 1118880, 1661616, 1882944, 2260800, 2529072
OFFSET
1,3
LINKS
FORMULA
a(n) = A001065(A002182(n)). - Amiram Eldar, Aug 05 2019
EXAMPLE
a(3) = 3 because sum of aliquot divisors of 3rd highly composite number i.e. 4 is 1 + 2 = 3.
MATHEMATICA
aliq[n_] := DivisorSigma[1, n] - n; s = {}; dm = 0; Do[d = DivisorSigma[0, n]; If[d > dm, dm = d; AppendTo[s, aliq[n]]], {n, 1, 1000}]; s (* Amiram Eldar, Aug 05 2019 *)
CROSSREFS
Sequence in context: A319752 A130095 A293993 * A360229 A375726 A369432
KEYWORD
nonn
AUTHOR
Shyam Sunder Gupta, Jul 21 2002
STATUS
approved