Explicación paso a paso:
[tex]280 = 2 \times 140 = 2 \times 2 \times 70 \\ 280 = 2 \times 2 \times 10 \times 7 \\ 280 = 2 \times 2 \times 2 \times 5 \times 7 \\ 280 = {2}^{3} \times 5 \times 7[/tex]
