Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#26 2013-02-26 20:11:59

Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,544

Re: no. of divisers

Hi bobbym

I think we should stop chatting because it is abother persons thread, and also, we have already reached that magical point where I have no idea what you are talking about.

“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment


#27 2013-02-27 05:01:20

Registered: 2012-11-21
Posts: 80

Re: no. of divisers

Yes Bobbym answer Given is

would you like to explain it to me. Thanks


#28 2013-02-27 05:26:57

From: Bumpkinland
Registered: 2009-04-12
Posts: 87,247

Re: no. of divisers


I know of nothing better than computing the divisors and then checking mod 4 for each one.

I have been researching the problem for something else but have not found anything.

Just finished reading 8 books on number theory, found 3 new was to compute the Jacobi symbol but did not find a shortcut for yours.

Last edited by bobbym (2013-02-27 12:01:44)

In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.


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