Q: What are the prime factors of the number 10,821,920?

 A: 2, 5, 239, 283

Why are those the prime factors of the number 10,821,920?

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 10,821,920

10,821,920
Factor Arrows
25,410,960
Factor Arrows
22,705,480
Factor Arrows
21,352,740
Factor Arrows
2676,370
Factor Arrows
2338,185
Factor Arrows
567,637
Factor Arrows
239283

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, 239, 283

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 239 x 283 = 10,821,920

This can also be written as 25 x 51 x 2391 x 2831 = 10,821,920

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


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