Q: What are the prime factors of the number 67,200?

 A: 2, 3, 5, 7

Why are those the prime factors of the number 67,200?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 67,200

67,200
Factor Arrows
233,600
Factor Arrows
216,800
Factor Arrows
28,400
Factor Arrows
24,200
Factor Arrows
22,100
Factor Arrows
21,050
Factor Arrows
2525
Factor Arrows
3175
Factor Arrows
535
Factor Arrows
57

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 5, 7

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 5 x 5 x 7 = 67,200

This can also be written as 27 x 31 x 52 x 71 = 67,200

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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