I wonder whether the most straightforward way could be to simply use the Spiral Tool with the right settings which depend on the exact kind of spiral, see Draw Spiral here,
How about the Lasso Tool (after locking any objects with Anchor Points that may get in the way, such as maybe (the top Anchor Point of) the circle in the centre)?
Now, I've come to a point where it is around 1500 pieces.
I tried "Join" and "Flatten Transparency" but couldn't have them in 1 solid piece. I think, I can do it with Pen Tool by clicking 1500x2 times but I'd be delighted if there's an easy way to unify them without changing the outer shape.