Re: Number Theory Functions

[avkalb <avkalb bway net>]

Now I understand.  Thank you.

Jean Bréfort wrote:
> 15 has actually 4 divisors: 1, 3, 5 and 15. What's wrong there?
>
> Le lundi 15 mars 2010 à 11:27 -0500, avkalb a écrit :
>   
> > Using Gnumeric Spreadsheet 1.10.1 and 64-bit Sidux.
> >
> > The Gnumeric Manual, Version 1.10, section A13 indicates some number theory
> > calculations are available.  I have briefly examined a few:
> >
> > Some functions give me reasonable outputs for simple test inputs:
> >     Isprime, ithprime, nt_pi,  nt_sigma, and pfactor.
> >
> > But nt_d doesn't  seem to work as I expected.  nt_d(n) is supposed to 
> > calculate the number of divisors of n
> > according to function reference A13 in The Gnumeric Manual, Version 1.10
> >
> > If you select the insert function from the menu bar and then select nt_d 
> > from the listing,  an example is given
> > that nt_d(4096) = 13. In actuality, 2^12 = 4096 i.e there are 12 
> > divisors of 2 in 4096.  If 1 also is included
> > as a divisor then 13 would be correct.
> >
> > But that doesn't explain the following results:
> >
> >  nt_d(15) =  4 
> >  nt_d(21) =  4
> >  nt_d(70) =  8
> >
> > though it would explain these:
> > n             7    11    31    16
> > nt_d(n)    2     2      2      5
> >
> > What's wrong?  Am I misinterpreting what the function is supposed to 
> > do?  Any suggestions?
> >
> >
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> >     
>
>
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