可羅薩里過剩數(,有時會簡稱CA)是指一正整數n,存在一正數ε,使得對於所有正整數m,下式恆成立:
:\frac{\sigma(m)}{m^{1+\varepsilon}}
其中σ為除數函數,是所有正因數(包括本身)的和
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外部連結
*[http://keithbriggs.info/abundant.html Keith Briggs on colossally abundant numbers and the Riemann hypothesis]
*[http://mathworld.wolfram.com/ColossallyAbundantNumber.html MathWorld entry]
*[http://keithbriggs.info/documents/RH_abundant-pp.pdf Notes on the Riemann hypothesis and abundant numbers]
*[http://www.mpim-bonn.mpg.de/preprints/send?year=&number=&name=&title=robin More on Robin's formulation of the RH]
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