Wolfram Language & System 10.4 (2016)|Legacy Documentation

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gives the divisor function .

Details and OptionsDetails and Options

  • Integer mathematical function, suitable for both symbolic and numerical manipulation.
  • is the sum of the ^(th) powers of the divisors of n.
  • DivisorSigma[k,n,GaussianIntegers->True] includes divisors that are Gaussian integers.
  • DivisorSigma automatically threads over lists.
Introduced in 1988