# Number Theory Forum

Number Theory Help Forum

1. ### prove that φ(n/p^K) is even

• Replies: 3
• Views: 530
Mar 26th 2012, 10:45 AM
2. ### show that n is an integer number thoery problem

• Replies: 1
• Views: 440
Mar 26th 2012, 10:12 AM
3. ### When 361..1*3611...1 is square number ?

• Replies: 0
• Views: 420
Mar 25th 2012, 07:18 AM
4. ### Sum of square free divisors of integer

• Replies: 3
• Views: 1,689
Mar 24th 2012, 12:23 PM
5. ### GCD

• Replies: 2
• Views: 408
Mar 23rd 2012, 07:29 PM
6. ### Finding number of integers not satisfying an expression

• Replies: 2
• Views: 524
Mar 22nd 2012, 08:45 PM
7. ### Show that 98^76543 + 21 is not divisible by 11.

• Replies: 12
• Views: 1,152
Mar 21st 2012, 11:32 PM
8. ### Euler's identity

• Replies: 1
• Views: 867
Mar 21st 2012, 04:38 PM
9. ### Primality Criteria for F_n(2336)

• Replies: 0
• Views: 635
Mar 21st 2012, 07:36 AM
10. ### Find all integers whose sum of divisors is equal to 48.

• Replies: 4
• Views: 745
Mar 20th 2012, 02:52 AM
11. ### Help with Matrices and Eigenvalues

• Replies: 1
• Views: 568
Mar 19th 2012, 12:10 PM
12. ### When is n choose 2 a perfect square?

• Replies: 5
• Views: 1,313
Mar 18th 2012, 06:51 PM
13. ### If gcd(aa,b)=1, then gcd(a-b,a+b)=1 or 2 for all integers a,b

• Replies: 8
• Views: 4,680
Mar 16th 2012, 06:53 AM
14. ### graph theory tree proof

• Replies: 0
• Views: 383
Mar 16th 2012, 12:12 AM
15. ### Well-ordering

• Replies: 0
• Views: 332
Mar 15th 2012, 08:38 PM
16. ### generalised formula for the series

• Replies: 2
• Views: 722
Mar 13th 2012, 01:03 AM
17. ### Prime factor

• Replies: 6
• Views: 691
Mar 12th 2012, 08:32 AM
18. ### 3x-14y=2 (solving over integers)

• Replies: 2
• Views: 850
Mar 11th 2012, 01:54 PM
19. ### Solve for a and b if:

• Replies: 6
• Views: 580
Mar 8th 2012, 09:52 AM
20. ### infinity and undefined

• Replies: 1
• Views: 1,305
Mar 8th 2012, 01:07 AM
21. ### phi(n) divides n-1 implies n is prime

• Replies: 2
• Views: 1,339
Mar 6th 2012, 05:09 AM
22. ### Determine the square roots of...

• Replies: 2
• Views: 440
Mar 5th 2012, 04:30 PM
23. ### Complex modulus of Z[sqrt(-10)]

• Replies: 1
• Views: 511
Mar 5th 2012, 01:53 AM
24. ### How to apply Mobius inversion formula

• Replies: 3
• Views: 1,765
Mar 2nd 2012, 09:16 AM
25. ### a problem with food!

• Replies: 0
• Views: 642
Mar 1st 2012, 01:25 AM
26. ### A problem with fractions.

• Replies: 5
• Views: 616
Mar 1st 2012, 01:20 AM
27. ### Euclidean Alogritm and Fibonacci proof problem

• Replies: 0
• Views: 511
Feb 29th 2012, 12:38 PM

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