Hello

I need help:

LetN= (2^(p)−1)2^(p-1), wherepis prime. Give the elements of the set

SNthat consists of the divisors ofN, others thanN:

SN={x1, x2, ..., xn},with

{i= 1,2...n:xi|N, xi 6=N}. What is the cardinality ofSN.

GiveNandSNforp= 2,5

thank you