practical numbers

[franktaw at netscape.net]

I don't think "sum of distinct divisors" is really overkill.  If you 
leave out the "distinct", you'll get people complaining "but every 
number is a sum of its divisors" - or worse, misunderstanding.

A096356.  (Which should really be edited to say "proper divisors" 
instead of just "divisors".  Adding an initial 1 at offset 0 would also 
make sense to me.)

Franklin T. Adams-Watters


-----Original Message-----
From: davidwwilson at comcast.net

Simce any number n is a repeated sum of any of its divisors, "sum of 
distinct divisors" seems like overkill. 
 
Anyway, another question: What is the smallest number a(n) that is a 
sum of its distinct divisors in n ways?  


________________________________________________________________________
Check Out the new free AIM(R) Mail -- 2 GB of storage and 
industry-leading spam and email virus protection.