Avoiding DIVIS in Number Theory 
Description:  Because the builtin DIVIS command can be slow, this has six commands useful in number theory that avoid using it: τ (how many divisors does X have?), σ (the sum of ALL the divisors of X), σ0 (the sum of the PROPER divisors of X), Ad (algebraic mean of the divisors of X), Hd (harmonic mean of the divisors of X), and Πd (product of all the divisors of X). 
Filename:  numtheory.zip 
ID:  8646 
Author:  Joseph K. Horn: http://HolyJoe.Org 
Downloaded file size:  2,170 bytes 
Size on calculator:  1 KB 
Platforms:  49/50 
User rating:  Not yet rated (you must be logged in to vote) 
Primary category:  Math/Symbolic 
Languages:  ENG 
File date:  20170820 21:13:35 
Creation date:  20100805 
Source code:  Included 
Download count:  349 
Version history:  20170820: Added to site

Archive contents:  Length Date Time Name
   
339 20170820 21:11 DIVIS.DIR
5832 20170820 21:12 divis.html
 
6171 2 files 

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