Encyclopedia > O > Ore's harmonic number
Ore's harmonic number
In mathematics, Ore's harmonic numbers, defined by Ăystein Ore in 1948, are defined as the sequence of positive integers such that, for each number M in the sequence, the harmonic mean of the positive divisors of M is itself an integer. The first few Ore harmonic numbers are 1, 6, 28, 140, 270, 496, 672, 1638, … .
Information are taken from Wikipedia, the open encyclopedia, to which contribute many volunteers from around the whole world. Texts are available under the following conditions GNU Free Documentation License.
Encyklopedie (cz) Encyklopédia (sk) Enzyklopädie (de)