OFFSET
1,1
COMMENTS
LINKS
MATHEMATICA
ad[1] = 0; ad[n_] := n * Total@(Last[#]/First[#]& /@ FactorInteger[n]); Select[Range[1, 2.5*10^6, 2], CompositeQ[#] && (d = ad[DivisorSigma[1, #]] - #) > 0 && Divisible[d, ad[#]] &] (* Amiram Eldar, Sep 19 2021 *)
PROG
CROSSREFS
Subsequence of A343218.
KEYWORD
nonn,more
AUTHOR
Antti Karttunen, Sep 19 2021
STATUS
approved