What are numbers that are between 1 and 20 and have exactly 4 factors

Answer this question, only if you know the answer. 30 points and brainliest!

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

Which best describes a central bank's primary goals? limiting inflation and reducing unemployment reducing unemployment and maintaining cash flow controlling stagflation and reducing unemployment managing credit and ensuring the money supply's liquidity