- #1
srfriggen
- 307
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Homework Statement
Prove: If 2p-1 is prime, then 2p-1(2p-1) is a perfect number.
Homework Equations
I am simply having trouble understanding one part of the end of the proof, namely:
Why does [itex]\sigma[/itex](2p-1)=2p-1 ?
The proof I'm working off of (trying to understand is on page 4 of this link: http://www.math.dartmouth.edu/~jvoight/notes/perfelem.pdf