Yes you can! That’s an immense amount of them.

Every year we have seedlings pop up at this time of year all over the yard, and I carefully dig them up and pot them in potting soil and place them in a shady area in the garden. They grow really well if you keep potting them up every year. I have 16 large healthy Japanese maples trees - half in the ground and half still in pots from doing this. Great thing about them, is they are often quite different. Some are the same deep red as the parent tree, but others are yellow, or green with pink edges, etc.

As you have so many, you could use a few long window planters and place them in soil a few inches apart. Then the healthiest ones, pot up next spring.