OFFSET
1,2
COMMENTS
Multiplicative because A327936 is.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..22680
Antti Karttunen, Data supplement: n, a(n) computed for n = 1..100000
FORMULA
a(n) = Sum_{d|n} A327936(d).
For all n >= 1, a(n) >= A000005(n).
Multiplicative with a(p^e) = e + 1 if e < p, and p*(e - p + 2) otherwise. - Amiram Eldar, Nov 30 2022
MATHEMATICA
f[p_, e_] := If[e < p, e + 1, p*(e - p + 2)]; a[1] = 1; a[n_] := Times @@ f @@@ FactorInteger[n]; Array[a, 100] (* Amiram Eldar, Nov 30 2022 *)
PROG
CROSSREFS
KEYWORD
nonn,mult
AUTHOR
Antti Karttunen, Nov 30 2022
STATUS
approved