How many computers can I download Logic Pro X on?

Hi, I bought Logic Pro X a few years ago and it’s been downloaded on my computer ever since. My dad wants to start using Logic Pro x on his computer too. Does my original purchase of Logic Pro x allow me to download it onto multiple computers? Can I just download it onto my dad’s computer? Or do I need to buy another copy of Logic Pro x if I want / my dad wants to use it on another computer? Thanks so much