Explore Books on
perfect numbers

Perfect, amicable, and sociable numbers

By Song Y. Yan

Primitive abundant numbers for some classes of arithmetic functions

By May Beresin

Perfect numbers

By Richard Warren Shoemaker

Perfect numbers

By Stanley J. Bezuszka

Vollkommene Zahlen

By Klaus Heiner Kamps

La tetraléctica de los números perfectos

By Jorge Emilio Molina R.

La tetraléctica de los números perfectos

By Jorge Emilio Molina Rivero