11Axx Elementary number theory
{For analogues in number fields, see 11R04}
- 11A05 Multiplicative structure; Euclidean algorithm; greatest common divisors
- 11A07 Congruences; primitive roots; residue systems
- 11A15 Power residues, reciprocity
- 11A25 Arithmetic functions; related numbers; inversion formulas
- 11A41 Primes
- 11A51 Factorization; primality
- 11A55 Continued fractions {For approximation results, see 11J70; see also 11K50, 30B70, 40A15}
- 11A63 Radix representation; digital problems {For metric results, see 11K16}
- 11A67 Other representations
- 11A99 None of the above, but in this section
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