Rafael Jakimczuk
      Two topics in number theory: sum of divisors of the primorial and sum of squarefree parts
      International Mathematical Forum, Vol. 12, 2017, no. 7, 331-338
      https://doi.org/10.12988/imf.2017.7113

Copyright © 2017 Rafael Jakimczuk. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.