Two. 1 to screw it in, and 1 to complain that it's not dark enough.
Two. Ant-Man and Wasp are the only ones small enough to fit inside a lightbulb.
5,6,7,8
Just one. They hold it in place while the world revolves around them.
One.
Make it sew number 1!
Twenty. 1 to drop it, 19 to go "Pick it up, pick it up, pick it up".
Because they have no inner-soles
None, they just all stand around complaining that it won't screw!