## Divisor Function!

For discussing Olympiad Level Number Theory problems
Labib
Posts: 411
Joined: Thu Dec 09, 2010 10:58 pm

### Divisor Function!

Please someone help me understand the $Divisor function$ and $Sigma function$. The definition in Wiki is just too hard for me to understand. You can also suggest books on this topic.
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tushar7
Posts: 101
Joined: Tue Dec 07, 2010 3:23 pm

### Re: Divisor Function!

good question . i wanted to say the same thing .

Hasib
Posts: 238
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### Re: Divisor Function!

Ye. I want to know too
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Dipan
Posts: 158
Joined: Wed Dec 08, 2010 5:36 pm

### Re: Divisor Function!

I am also interested........

Moon
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### Re: Divisor Function!

Read 104 number theory problems. It's first 70 pages are good introduction to number theory for the beginners.
http://www.kmcbd.org/books
"Inspiration is needed in geometry, just as much as in poetry." -- Aleksandr Pushkin

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Masum
Posts: 592
Joined: Tue Dec 07, 2010 1:12 pm

### Re: Divisor Function!

I think you meant $\tau (n)$ and $\sigma (n)$.For these Moon's suggestion is appropaite
One one thing is neutral in the universe, that is $0$.

Labib
Posts: 411
Joined: Thu Dec 09, 2010 10:58 pm

### Re: Divisor Function!

Thnx moon vai, masum vai!!
Please Install $L^AT_EX$ fonts in your PC for better looking equations,
Learn how to write equations, and don't forget to read Forum Guide and Rules.

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Sherlock Holmes

tushar7
Posts: 101
Joined: Tue Dec 07, 2010 3:23 pm

### Re: Divisor Function!

yap ..........thanks from me too ( irrelevant post !!)

Masum
Posts: 592
Joined: Tue Dec 07, 2010 1:12 pm
One one thing is neutral in the universe, that is $0$.