OFFSET
1,4
COMMENTS
A factorization of n is a finite, nondecreasing sequence of positive integers > 1 with product n. It is strict if the factors are all different.
MATHEMATICA
facs[n_]:=If[n<=1, {{}}, Join@@Table[Map[Prepend[#, d]&, Select[facs[n/d], Min@@#>=d&]], {d, Rest[Divisors[n]]}]];
Table[Round[Length[facs[n]]/Length[Select[facs[n], UnsameQ@@#&]]], {n, 100}]
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Gus Wiseman, Jan 10 2020
STATUS
approved