1,2

If a multiply perfect number k has abundancy m = sigma(k)/k, then k must have at least A005579(m) distinct prime factors.

T. D. Noe, Table of n, a(n) for n=1..5000 (using Flammenkamp's data)

Achim Flammenkamp, The Multiply Perfect Numbers Page

Sequence in context: A229123 A173908 A054030 * A054714 A235922 A255598

Adjacent sequences: A134737 A134738 A134739 * A134741 A134742 A134743

nonn

T. D. Noe, Nov 07 2007

approved