We show that there is an effectively computable upper bound of odd perfect numbers whose Euler factors are powers of fixed exponent.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm103-2-13,
author = {Tomohiro Yamada},
title = {Odd perfect numbers of a special form},
journal = {Colloquium Mathematicae},
volume = {103},
year = {2005},
pages = {303-307},
zbl = {1086.11008},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm103-2-13}
}
Tomohiro Yamada. Odd perfect numbers of a special form. Colloquium Mathematicae, Tome 103 (2005) pp. 303-307. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm103-2-13/