We study the sum τ of divisors of the quadratic form m₁² + m₂² + m₃². Let . We obtain the asymptotic formula S₃(X) = C₁X³logX + C₂X³ + O(X²log⁷X), where C₁,C₂ are two constants. This improves upon the error term obtained by Guo and Zhai (2012).
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-aa163-2-6, author = {Lilu Zhao}, title = {The sum of divisors of a quadratic form}, journal = {Acta Arithmetica}, volume = {166}, year = {2014}, pages = {161-177}, zbl = {06288685}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa163-2-6} }
Lilu Zhao. The sum of divisors of a quadratic form. Acta Arithmetica, Tome 166 (2014) pp. 161-177. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa163-2-6/