New posts in Multiplicative Function

Explain why the following is or isn't a multiplicative function.

Some convincing reasoning to show that to prove that Ramanujan tau function is multiplicative is very difficult

Dirichlet Convolution of the Mobius Function with Itself

Dirichlet series associated to squared Möbius

The sigma function (sum of divisors) multiplicative proof

Very elementary proof of that Euler's totient function is multiplicative

Prove $\sum_{k\mid n}{\mu(k)d(k)}=(-1)^{\omega{(n)}}$

Proving $ \phi(mn)=\phi(m)\phi(n) \frac k{\phi(k)}$

How to find the nearest multiple of 16 to my given number n

What's the proof that the Euler totient function is multiplicative?