Ramanujan's theorem and highest abundant numbers
Number Theory
2020-07-23 v4 Combinatorics
Abstract
In 1915, Ramanujan proved asymptotic inequalities for the sum of divisors function, assuming the Riemann hypothesis (RH). We consider a strong version of Ramanujan's theorem and define highest abundant numbers that are extreme with respect to the Ramanujan and Robin inequalities. Properties of these numbers are very different depending on whether the RH is true or false.
Keywords
Cite
@article{arxiv.1905.09327,
title = {Ramanujan's theorem and highest abundant numbers},
author = {Oleg R. Musin},
journal= {arXiv preprint arXiv:1905.09327},
year = {2020}
}
Comments
12 pages, 1 figure