You can have 1 number {1} and two numbers {e, π} but not 1.5 numbers. Therefore all numbers are many not much.
It's about having an indivisible base quantity or not.

I can't have 1 water, I have to agree on a reference amount first and get 1 liter, glas, bottle, or bald eagle worth of water.

Real numbers can't be listed, they are uncountably infinite. And water can be listed. I'd like to order 2 glasses, one bottle, 1.5l, and 231 imperial cubic inches of water please. You could even convert that into integers using molecular counts, but the base unit 1 molecule of water is useless when talking about the concept of water, so in effect and historic knowledge there is none.

You can have many numbers each of much amount.