TOT 108 1986 Spring J2 each digit of decimal repr. of N divides N
Source:
August 29, 2019
number theorymaximumDigitsDivide
Problem Statement
A natural number is written in its decimal representation . It is known that for each digit in this representation , this digit divides exactly into the number (the digit is not encountered). What is the maximum number of different digits which there can be in such a representation of ? (S . Fomin, Leningrad)