[tex]a)15 = 1 \times 15 = 3 \times 5[/tex]
[tex]b)28 = 1 \times 28 = 2 \times 14 = 4 \times 7[/tex]
[tex]c)56 = 1 \times 56 = 2 \times 28 = 4 \times 14 = 7 \times 8[/tex]
[tex]d)324 = 1 \times 324 = 2 \times 162 = 3 \times 108 = 4 \times 81 = 6\times54=9 \times 36 = 12 \times 27 = 18 \times 18 [/tex]
[tex]e)200 = 1 \times 200 = 2 \times 100 = 4 \times 50 = 8 \times 25 = 10 \times 20=5\times40[/tex]