## Finding Factors

The factors of a number can be found.## A Simple Example of How to Find Factors

Finding the factors of a number is easy. Find pairs of numbers that multiply to make that number.## Question

What are the factors of the number 18?## Step-by-Step:

# 1

**1**and the number itself (

**18**) are factors of 18.

1 × 18 = 18

Write **1**and

**18**on the outside of a grid.

# 2

Divide 18 by 2.

**Does it divide exactly?**
18 ÷ 2 = 9

**Yes**.**2**and the answer of the division (**9**) are factors of 18.
2 × 9 = 18

Write **2**and**9**in the grid, just inside the outside entries.# 3

Divide 18 by 3.

**Does it divide exactly?**
18 ÷ 3 = 6

**Yes**.**3**and the answer of the division (**6**) are factors of 18.
3 × 6 = 18

Write **3**and**6**in the grid, just inside the previous entries.# 4

Divide 18 by 4.

**Does it divide exactly?**
18 ÷ 4 = 4.5

**No**. The answer is not a whole number. 4 is not a factor.# 5

Divide 18 by 5.

**Does it divide exactly?**
18 ÷ 5 = 3.6

**No**. The answer is not a whole number. 5 is not a factor.# 6

Divide 18 by 6.
We already know that

**6**is a factor of 18, it is already in the grid. We have found all the factors.## Answer:

The factors of 18 are**1**,

**2**,

**3**,

**6**,

**9**and

**18**.