Několik kapitol z nauky o číslech
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Neuere Untersuchungen über die Jacobsthal-Funktion g(n).
H.-J. Kanold (1977)
Monatshefte für Mathematik
New Inversion Properties of ... and ...*.
D. Suryanarayana (1971)
Elemente der Mathematik
Nonaliquots and Robbins numbers
William D. Banks, Florian Luca (2005)
Colloquium Mathematicae
Let φ(·) and σ(·) denote the Euler function and the sum of divisors function, respectively. We give a lower bound for the number of m ≤ x for which the equation m = σ(n) - n has no solution. We also show that the set of positive integers m not of the form (p-1)/2 - φ(p-1) for some prime number p has a positive lower asymptotic density.
Note on a congruence involving products of binomial coefficients.
Xu, Ping, Pan, Hao (2007)
Integers
Note on multiplicative functions satisfying congruence property. II.
Bui Minh Phong, Fehér, János (1999)
Mathematica Pannonica
Note on perfect and multiply perfect numbers
McCarthy, Paul J. (1957)
Portugaliae mathematica
Note sur les diviseurs d'un nombre entier
E. Lionnet (1868)
Nouvelles annales de mathématiques : journal des candidats aux écoles polytechnique et normale
Notes on generalized Dedekind sums
Donald Knuth (1977)
Acta Arithmetica
Notes on power LCM matrices
Shaofang Hong (2004)
Acta Arithmetica
Nouveau théorème concernant la fonction numérique .
Liouville, J. (1869)
Journal de Mathématiques Pures et Appliquées
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