Q: What are the prime factors of the number 362,880?

 A: 2, 3, 5, 7

Why are those the prime factors of the number 362,880?

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 362,880

362,880
Factor Arrows
2181,440
Factor Arrows
290,720
Factor Arrows
245,360
Factor Arrows
222,680
Factor Arrows
211,340
Factor Arrows
25,670
Factor Arrows
22,835
Factor Arrows
3945
Factor Arrows
3315
Factor Arrows
3105
Factor Arrows
335
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 3 x 3 x 3 x 5 x 7 = 362,880

This can also be written as 27 x 34 x 51 x 71 = 362,880

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


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