Problem 18E

Prove that if n is a positive integer such that the sum of the divisors of n is n + 1, then n is prime.

Step-by-Step Solution:

Solution:Step 1In this problem we need to prove that if sum of divisors of a positive integer n is n + 1, then n is a prime number.

Step 2 of 3

###### Chapter 4.SE, Problem 18E is Solved

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Step 3 of 3