Positive integers divisible by the product of their nonzero digits
Florian Luca
UNAM, Campus Morelia, Michoacán, MexicoJean-Marie De Koninck
Université Laval, Quebec, Canada

Abstract
Let denote the set of positive integers which are divisible by the product of their nonzero digits. In this note, we show that if is large, then .
Cite this article
Florian Luca, Jean-Marie De Koninck, Positive integers divisible by the product of their nonzero digits. Port. Math. 64 (2007), no. 1, pp. 75–85
DOI 10.4171/PM/1777