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Math Help - multiplicative

  1. #1
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    Compute sigma(n)

    See attachment. Thanks
    Attached Thumbnails Attached Thumbnails multiplicative-untitled.jpg  
    Last edited by bigb; October 18th 2008 at 03:02 PM.
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  2. #2
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    1) \sigma (p^k) = \frac{p^{k+1} - 1}{p-1} where p is prime.
    2) \sigma (nm) = \sigma( n ) \sigma (m) for relatively prime positive integers.

    With that you can solve the problem.
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