English

A Study of @-numbers

Number Theory 2021-05-28 v4

Abstract

This paper deals more generally with @-numbers defined as follows: Call `\textit{alpha number}' of order (α,αˉ)H2(\underline{\alpha},\bar{\alpha})\in\mathbb{H}^2, (denote its family by @(α,αˉ)H2;AN_{(\underline{\alpha},\bar{\alpha})\in\mathbb{H}^2; \mathcal{A}\subset \mathbb{N}}) any nANn\in\mathcal{A}\subset \mathbb{N} satisfying σα(n)=αnαˉ\sigma_{\underline{\alpha}}(n) = \alpha n^{\bar{\alpha}} where σα(n)\sigma_{\underline{\alpha}}(n) is sum of divisors function and αH\alpha\in\mathbb{H}, the set of \textit{quaternions}. Specifically, if integer nn is such that α=α1/α2, α1,α2Z+\alpha=\alpha_1/\alpha_2,\ \alpha_1,\alpha_2\in\mathbb{Z}^+ with 1max(α1,α2)ω(n),1\leq\max(\alpha_1, \alpha_2) \le \omega(n),  τ(n), <n\ \le \tau (n), \ < n (where ω(n)\omega(n) is the number of distinct prime factors of nn, τ(n)\tau (n) is the number of factors of nn), then nn is respectively called strong, weak or very weak alpha number. We give some examples and conjecture that there is no odd strong alpha number of order (1,1)(1,1). The truthfulness of this assertion implies that there is no odd perfect and certain odd multi-perfect numbers. We give all the strong even alpha numbers of order (1,1)(1,1) below 10510^5 and then show that there is no odd strong alpha number of order (1,1)(1,1) below 10510^5, using some of our results motivated by some results of Ore and Garcia. With computer search this bound can easily be surpassed. In this paper, using Rossen, Schonfield and Sandor's inequalities, in addition to the aforementioned definition, we also bound the quotient α1/α2=α\alpha_1/\alpha_2 =\alpha of order (1,1)(1,1), though a very weak bound. Some areas for future research are also pointed out as recommendations.

Keywords

Cite

@article{arxiv.1906.05798,
  title  = {A Study of @-numbers},
  author = {Abiodun E. Adeyemi},
  journal= {arXiv preprint arXiv:1906.05798},
  year   = {2021}
}

Comments

Proffessor J. Shallit's comment addressed. The results have been standardized. Still under review

R2 v1 2026-06-23T09:53:00.647Z