where is the Totient Function and is the Divisor Function.

**References**

Finch, S. ``Favorite Mathematical Constants.'' http://www.mathsoft.com/asolve/constant/totient/totient.html

Zimmerman, P. http://www.mathsoft.com/asolve/constant/totient/zimmermn.html.

© 1996-9

1999-05-26