
Raji, Exercises 4.1: 1. Determine whether the arithmetic functions f
... I guess we have to factor those numbers into primes: 5186 = 2 2593 and 5187 = 3 7 13 19. So ' (5186) = 1 2592, and ' (5187) = 2 6 12 18 = 2592. 3. Find all positive integers n such that ' (n) = 6. How far do we have to look? If n is divisible by a prime p, then ' (n) is divisible by p 1, so n can’t ...
... I guess we have to factor those numbers into primes: 5186 = 2 2593 and 5187 = 3 7 13 19. So ' (5186) = 1 2592, and ' (5187) = 2 6 12 18 = 2592. 3. Find all positive integers n such that ' (n) = 6. How far do we have to look? If n is divisible by a prime p, then ' (n) is divisible by p 1, so n can’t ...