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A068977 Numbers n such that sum(d|n,d/tau(d)) is an integer m, say, where tau(x)=A000005(x). 1
1, 2, 6, 10, 14, 18, 22, 26, 28, 34, 38, 46, 52, 56, 58, 62, 74, 76, 82, 86, 94, 104, 106, 118, 122, 124, 134, 142, 146, 148, 152, 158, 166, 168, 172, 178, 194, 202, 206, 208, 214, 218, 226, 244, 248, 254, 262, 268, 274, 278, 280, 292, 296, 298, 302, 312, 314 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..57.

MATHEMATICA

Select[Range[1000], IntegerQ[Sum[k/DivisorSigma[0, k], {k, Divisors[#]}]] &] (* Vaclav Kotesovec, Mar 22 2019 *)

CROSSREFS

Cf. A182463.

Sequence in context: A184914 A232176 A187884 * A251538 A111284 A130824

Adjacent sequences:  A068974 A068975 A068976 * A068978 A068979 A068980

KEYWORD

easy,nonn,changed

AUTHOR

Benoit Cloitre, Apr 06 2002

STATUS

approved

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Last modified March 23 04:46 EDT 2019. Contains 321422 sequences. (Running on oeis4.)