We consider a conjecture of Erdős and Rosenfeld and a conjecture of Ruzsa when the number is a perfect square. In particular, we show that every perfect square n can have at most five divisors between and .
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-aa163-2-4,
author = {Tsz Ho Chan},
title = {Factors of a perfect square},
journal = {Acta Arithmetica},
volume = {166},
year = {2014},
pages = {141-143},
zbl = {1300.11012},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa163-2-4}
}
Tsz Ho Chan. Factors of a perfect square. Acta Arithmetica, Tome 166 (2014) pp. 141-143. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa163-2-4/