Freaky Function!

Algebra Level 3

A function \(f: \mathbb{N} \rightarrow \mathbb{N}\) is such that

1) \(f(xy)= f(x)f(y)\)

2) The function is strictly increasing.

3) \(f(2)=2\)

Find \(\sum _{ k=1 }^{ 20 }{ f(k) } \)

×

Problem Loading...

Note Loading...

Set Loading...