Geodesic
On orders solely of abelian groups
Glasgow mathematical journal, Tome 29 (1987) no. 1, pp. 105-108

Voir la notice de l'article provenant de la source Cambridge University Press

Let n = be the factorization of an integer n(>1) into prime powers, and set Φ(n):= . In particular, for squarefree n, Φ(n) = phi;(n). Consider the set.It is known (from [5]) that A consists precisely of those integers n for which there is no non-abelian group of order n. It is also known (from [7]) that the setconsists solely of integers n with the property that every group of order n is cyclic. We set C′ = A – C. 
Srinivasan, S. On orders solely of abelian groups. Glasgow mathematical journal, Tome 29 (1987) no. 1, pp. 105-108. doi: 10.1017/S0017089500006728
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