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11A05 - Number theory :: Elementary number theory :: Multiplicative structure; Euclidean algorithm; greatest common divisors

  1. a formula for amicable pairs owned by alozano
  2. abundance owned by CompositeFan
  3. abundant number owned by CompositeFan
  4. almost perfect number owned by PrimeFan
  5. alternative proof of Euclid's lemma owned by alozano
  6. amicable numbers owned by alozano
  7. Bezout's lemma (number theory) owned by mathwizard
  8. Chinese remainder theorem owned by bwebste
  9. colossally abundant number owned by CompositeFan
  10. conditional congruences owned by pahio
  11. congruence owned by rspuzio
  12. congruence of arbitrary degree owned by pahio
  13. contraharmonic means and Pythagorean hypotenuses owned by pahio
  14. corollary of Bézout's lemma owned by pahio
  15. deficiency owned by PrimeFan
  16. deficient number owned by PrimeFan
  17. derivation of Pythagorean triples owned by pahio
  18. determination of abundant numbers with specified prime factors owned by rspuzio
  19. determination of even abundant numbers with one odd prime factor owned by rspuzio
  20. divisibility by prime number owned by pahio
  21. divisibility of nine-numbers owned by pahio
  22. Erdős-Woods number owned by PrimeFan
  23. Euclid's algorithm owned by rmilson
  24. Euclid's coefficients owned by pahio
  25. Euclid's lemma owned by KimJ
  26. Euclid's lemma proof owned by akrowne
  27. Euler product owned by bbukh
  28. every even integer greater than 46 is the sum of two abundant numbers owned by PrimeFan
  29. every even integer greater than 70 is the sum of two abundant numbers in more than one way owned by PrimeFan
  30. every sufficiently large even integer can be expressed as the sum of a pair of abundant numbers owned by rspuzio
  31. examples of ranges of consecutive integers for Erdős-Woods numbers owned by PrimeFan
  32. examples of smooth numbers owned by PrimeFan
  33. examples of uniqueness of digital representation of small numbers in a few bases owned by PrimeFan
  34. fast Euclidean algorithm owned by mathcam
  35. formula for sum of divisors owned by rspuzio
  36. fourth power owned by CompositeFan
  37. fundamental theorem of arithmetic owned by CWoo
  38. highly abundant number owned by CompositeFan
  39. hyperperfect number owned by CompositeFan
  40. incircle radius determined by Pythagorean triple owned by pahio
  41. integer contraharmonic means owned by pahio
  42. long division owned by alozano
  43. multiply perfect number owned by CompositeFan
  44. Ore number owned by CompositeFan
  45. perfect number owned by Wkbj79
  46. positive multiple of a semiperfect number is also semiperfect owned by PrimeFan
  47. positive multiple of an abundant number is abundant owned by Mathprof
  48. probability that two positive integers are relatively prime owned by mps
  49. proof of Chinese remainder theorem owned by mclase
  50. proof of long division owned by Thomas Heye
  51. Pythagorean hypotenuses as contraharmonic means owned by pahio
  52. Python code to calculate Euclid's coefficients owned by drini
  53. quasiperfect number owned by CompositeFan
  54. smooth number owned by CompositeFan
  55. sphenic number owned by CompositeFan
  56. Stern-Brocot tree owned by bbukh
  57. Sturm's theorem owned by rspuzio
  58. table of small multiply perfect numbers owned by PrimeFan
  59. Thabit number owned by Mravinci
  60. theorem on multiples of abundant numbers owned by CompositeFan
  61. uniqueness of digital representation owned by pahio
  62. unitary perfect number owned by CompositeFan
  63. untouchable number owned by PrimeFan

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