Geodesic
On The Number of Groups of Squarefree Order
Canadian mathematical bulletin, Tome 30 (1987) no. 4, pp. 412-420

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Let G(n) denote the number of non-isomorphic groups of order n. We prove that for squarefree integers n, there is a constant A such that where denotes the Euler function. This upper bound is essentially best possible, apart from the constant A.
DOI : 10.4153/CMB-1987-061-x
Mots-clés : 10H26 
Murty, M. Ram; Srinivasan, S. On The Number of Groups of Squarefree Order. Canadian mathematical bulletin, Tome 30 (1987) no. 4, pp. 412-420. doi: 10.4153/CMB-1987-061-x
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     title = {On {The} {Number} of {Groups} of {Squarefree} {Order}},
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