Keneth Adrian P. Dagal
      A lower bound for \tau(n) of any k-perfect numbers
      Pure Mathematical Sciences, Vol. 4, 2015, no. 3, 99-103
      http://dx.doi.org/10.12988/pms.2015.4923

Copyright © 2014 Keneth Adrian P. Dagal. 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.