n is superperfect if \sigma(\sigma(n))=2n
  • Show that if n=2^q where 2^{q+1}+1 is prime, then n is superperfect
\sigma(\sigma(2^q))=\sigma(2^{q+1}-1) etc., so this part is ok for me
  • Show that every even superperfect number is of this form.
Need help on this part.
Thank you for your help