On the congruences $σ(n) ≡ a (mod n)$ and $n ≡ a (mod φ(n))$

DOI10.4064/aa-26-3-265-272zbMath0266.10005OpenAlexW1180421166MaRDI QIDQ5682029

Carl B. Pomerance

Publication date: 1975

Published in: Acta Arithmetica (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/205314

Mathematics Subject Classification ID

Congruences; primitive roots; residue systems (11A07) Arithmetic functions; related numbers; inversion formulas (11A25) Rate of growth of arithmetic functions (11N56)

Related Items (4)

DIVISOR‐SUM FIBERS ⋮ On perfect and near-perfect numbers ⋮ On quasi-imperfect numbers with at most four distinct prime divisors ⋮ On near-perfect numbers

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