Request for Extension for this Project

Hello
 my first Issue and my first Pull requests of All-time are a little extension to that Project. 
My  PullRequest will contain the following things
 to the Maths Classes
 1) the  Amicable Numbers 
2)  the Vampire Numbers
3) Regular pairs of Amicable Numbers

and maybe if I find the Time the One Time Pad or another chipper Algorithm 
Hopefully, it is helpful 