1998/52/3-4 (30) — DOI: 10.5486/PMD.1998.2029 — pp. 683-698
Full Text Abstract

A companion to a Lehmer problem

Authors: M. V. Subbarao

Keywords: Euler totient, unitary totient, $σ$*(n), Dedekind function $ψ$(n)

Mathematics Subject Classification: 11A25