I am looking for a way to calculate how similar each number is compared to every other number in a set. Here's an example: `[61, 62, 59, 60, 63, 62, 58]` would have a high "similarity score", where as `[12, 96, 71, 66, 108, 23, 5, 59]` would have a low "similarity score". Is there a term for this, and how would I calculate it?