FACTORS OF NUMBERS P.5

• These are numbers multiplied to give you a certain number.
• They can also be called the divisors of a number.

Example

Find all the factors of 18.

1 x 18 = 18

2 x 9 = 18

3 x 6 = 18

F₁₈ = {1, 2, 3, 6, 9, 18}

Example 2

List down all the factors of 24.

F₂₄

1 x 24 = 24

2 x 12 = 24

3 x 8 = 24

4 x 6 = 24

F₂₄ = {1, 2, 3, 4, 6, 8, 12, 24}

Greatest common factor (by listing)

Find the G.C.F of 12 and 17.

F₁₂                                                                         F₁₈

1 x 12                                       1 x 18

2 x 6                                         2 x 9

3 x 4                                         3 x 6