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arXiv:0707.4090 [math.NT]AbstractReferencesReviewsResources

On some properties of $σ(N)$

Tomohiro Yamada

Published 2007-07-27Version 1

We show asymptotic upper and lower bounds for the greatest common divisor of N and $\sigma(N)$. We also show that there are infinitely many integers N with fairly large g.c.d. of N and $\sigma(N)$.

Comments: 10 pages
Categories: math.NT
Subjects: 11A05, 11A25
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