Q: What are the prime factors of the number 920,320?

 A: 2, 5, 719

Why are those the prime factors of the number 920,320?

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 920,320

920,320
Factor Arrows
2460,160
Factor Arrows
2230,080
Factor Arrows
2115,040
Factor Arrows
257,520
Factor Arrows
228,760
Factor Arrows
214,380
Factor Arrows
27,190
Factor Arrows
23,595
Factor Arrows
5719

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, 719

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 5 x 719 = 920,320

This can also be written as 28 x 51 x 7191 = 920,320

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


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