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

Author

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

Keywords

• nonn
• more

Comments

Contains no primes.

Examples

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

Crossrefs

Includes A139256.

Cf. A341038.

Programs

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]);