1. “I can find all the factors of a whole number.”
Factor Rainbows
“I can find all the factors
of a whole number.”

2. What is a factor?
Factoring means to take a number apart. Factors are what you multiply together to get a number.
Example:
If our number is 10, two factors are 2 and 5 because 2 x 5 is 10.

3. What are Factor Pairs? Factor pairs are two numbers that when
Multiplied together equal your target
number.
For example: Factor pairs for 10 are...
1 x 10 and 2x5
There are 2 factor pairs for the number ten.

4. Finding Factors It has 4 factors!
In order to find all of the factors of a number you need to go through all of the numbers that can be multiplied together to make that number.
Our example number 10 has 4 factors...
1, 2, 5 and 10 because...
1 x 10 = 10
2 x 5 = 10
It has 4 factors!

5. Factor Rainbows
What is a factor rainbow? A factor rainbow helps you find all of the factors. It is called a rainbow because all of the factor pairs connect to make a rainbow!

6. How do we do it!?!?!? 3 Making a factor rainbow is easy as pie!
Let’s try one:
Find all of the factors for the number 12.
We start by counting and seeing if a
number can be multiplied to equal 12.
How many factor pairs are there for the number 12? 3 1 2 3 4 6 12

7. Steps: Step One: Start with 1 and the number itself.
Step Two: Count up by ones to see if you can multiply two numbers together to get your target number.
Step Three: Stop when you can’t get anymore numbers in between.
Step Four: Connect the factor pairs!

8. One more time... 3 How many factor pairs are there for the number 18?2 3 6 9 18

9. YOU TRY! Make factor rainbows for the following
numbers and tell how many factor pairs
each number has.