OFFSET
1,9
COMMENTS
Number of such positive integers k that divide n but A000120(k) [the Hamming weight of k] does not divide n.
LINKS
FORMULA
MATHEMATICA
a[n_] := DivisorSum[n, 1 &, !Divisible[n, DigitCount[#, 2, 1]] &]; Array[a, 100] (* Amiram Eldar, Dec 04 2020 *)
PROG
(PARI) A324393(n) = sumdiv(n, d, !!(n%hammingweight(d)));
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Antti Karttunen, Mar 05 2019
STATUS
approved