Q: What are the prime factors of the number 1,792,000?

 A: 2, 5, 7

Why are those the prime factors of the number 1,792,000?

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 1,792,000

1,792,000
Factor Arrows
2896,000
Factor Arrows
2448,000
Factor Arrows
2224,000
Factor Arrows
2112,000
Factor Arrows
256,000
Factor Arrows
228,000
Factor Arrows
214,000
Factor Arrows
27,000
Factor Arrows
23,500
Factor Arrows
21,750
Factor Arrows
2875
Factor Arrows
5175
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, 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 2 x 2 x 2 x 2 x 5 x 5 x 5 x 7 = 1,792,000

This can also be written as 211 x 53 x 71 = 1,792,000

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


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