sumtimes product dividing n
David W. Wilson
wilson at aprisma.com
Wed Dec 12 23:10:36 CET 2001
"M.V Subbarao" wrote:
>
> I wonder if there are infinitely many integers n such that the sum of its
> digits times product of its digits is a divisor of n. On example is n =
> 12. No doubt, we can easily find many more.
>
> M.V.Subbarao
> m.v.subbarao at ualberta.ca
Empirically, it looks as if every number of the form (10^3^n-1)/9 has the
desired property, which would make A049102 infinite. Needs a proof, tho.
More information about the SeqFan
mailing list