publication . Preprint . 2017

An improvement of an inequality of Ochem and Rao concerning odd perfect numbers

Zelinsky, Joshua;
Open Access English
  • Published: 21 Jun 2017
Abstract
Let $\Omega(n)$ denote the total number of prime divisors of $n$ (counting multiplicity) and let $\omega(n)$ denote the number of distinct prime divisors of $n$. Various inequalities have been proved relating $\omega(N)$ and $\Omega(N)$ when $N$ is an odd perfect number. We improve on these inequalities. In particular, we show that if $3 \not| N$, then $\Omega \geq \frac{8}{3}\omega(N)-\frac{7}{3}$ and if $3 |N$ then $\Omega(N) \geq \frac{21}{8}\omega(N)-\frac{39}{8}.$
Subjects
free text keywords: Mathematics - Number Theory, 11A05 (Primary), 11A25 (Secondary)
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[1] On the number of prime factors of an odd perfect number. Pascal Ochem and Michael Rao. Math. Comp. 83 (2014), 2435-2439.

[2] Odd perfect numbers, Diophantine equations, and upper bounds. P.P. Nielsen. Math. Comp. 84 (2015) 2549-2567.

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