A341039 Numbers k such that k divides A341038(k).

1, 12, 18, 56, 117, 810, 992, 2091, 16256, 796797, 2488734, 22122192, 57636005, 67100672, 114243682

Offset

1,2

Comments

Contains no primes.

Links

Table of n, a(n) for n=1..15.

Example

a(3) = 18 is a term because A341038(18) = 198 is divisible by 18.

Maple

f:= proc(n) local D, S, i;
  D:= sort(convert(numtheory:-divisors(n), list));
  S:= ListTools:-PartialSums(D);
  add(S[-i]*D[i], i=1..nops(D))
end proc:
select(t -> f(t) mod t = 0, [$1..20000]);

Crossrefs

Includes A139256.

Cf. A341038.

Sequence in context: A152615 A258088 A259263 * A279369 A119147 A370395

Adjacent sequences: A341036 A341037 A341038 * A341040 A341041 A341042

Keyword

nonn,more

Author

J. M. Bergot and Robert Israel, Feb 03 2021

Status

approved