2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164343Let $f(n)$ denote the number of distinct unordered factorisations of the natural number $n$ into factors larger than 1.In this paper, we address some aspects of the function $f(n)$.14 pagesNumber TheoryOn the Oppenheim's "factorisatio numerorum" functiontext