18 = 3 x 6

9 = 3 x 3

6 = 2 x 3

so all the numbers that go into 18 (evenly) are:

1 2 3 6 9 18

Some teachers might disallow

1 & 18

6

depending on how they define their terms

my sister is a math teacher (high school & college) & I have sometimes asked here questions about different people using different rules (e.g. rounding) and she basically said that there are no hard and fast rules … this rule valid … that rule valid

I am assuming decimal (base 10) number system when answering this

1*18

2*9

3*6

2*3*3

3*6*1

Hence the factors of 18 are 1,2,3,6,9,18.

simply put, they are the small numbers when multipled toegther will give you the number.

what numbers multipled together gives you 18?

18 = 9 times 2

but 9 = 3 times 3

since 2 and 3 have only factors of themselves, we stop there.

The factors of 18 are 2 and 3.

Some teachers will say 2, 3, and 3.

Follow whichever standard your teacher uses.