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2*2*2*5*7 = 280

The easiest was to find the result is to start by dividing the number by small prime factors (2, 3, 5). Since 280 ends in a zero, 5 will be a prime factor and now you are reducing 56. This is an even number, so you can divide by 2 until you get to an odd number.

56/2 = 28

28/2 = 14

14/2 = 7

7 is a Prime number, so you are done. The complete tree, laid out in the order determined, is 5 x 2 x 2 x 2 x 7.

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