Write all the factors of the following numbers: (a) 24 (b) 15 (c) 21 (d) 27 (e) 12 (f) 20 (g) 18 (h) 23 (i) 36

(a) 24 = 1 x 24 = 2 x 12 = 3 x 8 = 4 x 6 = 6 x 4
Factors of 24 = 1, 2, 3, 4, 6, 12, 24
(b) 15 = 1 x 15 = 3 x 5 = 5 x 3
Factors of 15 = 1, 3, 5, 15
(c) 21 = 1 x 21 = 3 x 7 = 7 x 3
Factors of 21 = 1, 3, 7, 21
(d) 27 = 1 x 27 = 3 x 9 = 9 x 3
Factors of 27 = 1, 3, 9, 27
(e) 12 = 1 x 12 = 2 x 6 = 3 x 4 = 4 x 3
Factors of 12 = 1, 2, 3, 4, 6, 12
(f) 20 = 1 x 20 = 2 x 10 = 4 x 5 = 5 x 4
Factors of 20 = 1, 2, 4, 5, 10, 20
(g) 18 = 1 x 18 = 2 x 9 = 3 x 6
Factors of 18 = 1, 2, 3, 6, 9, 18
(h) 23 = 1 x 23
Factors of 23 = 1, 23
(i) 36 = 1 x 36 = 2 x 18 = 3 x 12 = 4 x 9 = 6 x 6
Factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18, 36

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