A **factor** of a number is any number that it can be divided by. To find all of the factors of a number, we simply start with 1 and then check each number to see if it can divide our number. We will notice that factors come in pairs, so eventually we will reach numbers which we have already found, and then we can stop.

**Example**

Find all of the factors of 36

**Exercise**

Let’s complete exercise 10C on pages 157 and 158 of the textbook, which will also remind us of the idea of **highest common factors**.

The answers are below: