On the quantity $m^2 - p^k$ where $p^k m^2$ is an odd perfect number (Published in NNTDM 26/4, November 2020)

My third joint paper with Immanuel T. San Diego, titled "On the quantity $m^2 - p^k$ where $p^k m^2$ is an odd perfect number", has been published in Notes on Number Theory and Discrete Mathematics (NNTDM 26/4, November 2020).