完美数

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So we're going to talk about the number 8128.

And it's a famous type of number called perfect number.

Now, this was the largest perfect number known in antiquity, or for a very long time.

But what is a perfect number?

The smallest perfect number is the number six.

So let's look at the number six.

Now what does it mean?

What divides into six?

Well, one divides into six.

That's always true.

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