A number-theoretic inquiry
- From: joseabdris <joseabdris@xxxxxxxxx>
- Date: Sat, 10 Jun 2006 03:36:40 EDT
Are there solutions to the number-theoretic equation:
sigma(sigma(A^2)) = 2*(A^2), where A is odd?
Note that, if we don't restrict A to be odd, then A = 2^k is a solution when sigma(A^2) is prime (i.e. a Mersenne prime).
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