Right, you do the tree diagram thing.
So you start of with 84.
84
/ \
2 42
/ \
2 21
/ \
3 7
All of the numbers in bold are prime numbers, thus expressing 84 of its prime factors so the answer is: 2 x 2 x 3 x 7 or 2 (to the power of)2 x 3 x 7 :-)
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As a product of its prime factors in exponents: 22*3*7 = 84
As a product of its prime factors: 2*2*3*7 = 84
The prime factors of 84 are: 2, 3 and 7. So, 2 x 2 x 3 x 7 = 84
The factors of 168 are: 1 2 3 4 6 7 8 12 14 21 24 28 42 56 84 168 The prime factors are: 2 x 2 x 2 x 3 x 7
By prime factoring 84 you get 2x2x7x3. These are all the factors of 84