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math.HO2004
An observation on the sums of divisors
Leonhard Euler, Jordan Bell
Translation from the Latin of Euler's "Observatio de summis divisorum" (1752). E243 in the Enestroem index. The pentagonal number theorem is that $\prod_{n=1}^\infty (1-x^n)=\sum_{…
math.HO2004
Expansion of the infinite product etc. into a simple series
Leonhard Euler, Jordan Bell
Translated from the Latin original "Evolutio producti infiniti etc. in seriem simplicem" (1775). E541 in the Enestroem index. In this paper…
math.HO2004
On amicable numbers
Leonhard Euler, Jordan Bell
Translated from the Latin original, "De numeris amicabilibus" (1747). E100 in the Enestroem index. Euler starts by saying that with the success of mathematical analysis, number the…