Question: 1. Let be the Euler totient function. (a) Evaluate (231). (b) Assume n is a product of 4 different odd prime numbers. Is it

1. Let be the Euler totient function. (a) Evaluate (231). (b) Assume 

1. Let be the Euler totient function. (a) Evaluate (231). (b) Assume n is a product of 4 different odd prime numbers. Is it true that 16 divides (n)? Prove it or give a counterexample.

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