Укажите среди данных произведений разложение числа 72 на простые множители.

1) 2 ⋅ 2 ⋅ 2 ⋅ 9
2) 9 ⋅ 8
3) 2 ⋅ 2 ⋅ 2 ⋅ 3 ⋅ 3
4) 2 ⋅ 2 ⋅ 2 ⋅ 4 ⋅ 3

• 2
• 3
• 1
• 4