2019/06/18 by Weingartner, Andreas
#11N25 #11N37 #FOS: Mathematics #Number Theory (math.NT)
paper · doi:10.48550/arxiv.1906.07819
An integer n≥ 1 is said to be practical if every natural number m ≤ n can be expressed as a sum of distinct positive divisors of n. The number of practical numbers up to x is asymptotic to c x/log x, where c is a constant. In this note we show that c=1.33607....