The number one shows us a singular entity to the exclusion of any other.
As I stated before, on my bicycle there is only one cog. Therefore there are not any others, in fact not only are they excluded, they would serve no purpose, as once the chain tension is set up, another cog would throw that off, and would cause the bicycle to be rendered useless to use in that condition.
Now concerning deity, the Bible is clear.
Deut. 6
4 Hear, O Israel: The LORD our God is one LORD:
Before we show who that one God is, we understand, there is only one to the exclusion of all others that would make the claim of deity. As you read the Bible, you see that if there could be another God, he would serve no purpose, the God of the Bible is sufficient in all things, and needs no assistance from any other.
Who is the God of the Bible?
Isaiah 45
22 Look unto me, and be ye saved, all the ends of the earth: for I am God, and there is none else.
Along with Acts 16:31 makes this very clear
31 And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.
Stick around as our list for the number one will continue to grow.