Q: What are the prime factors of the number 8,423,872?

 A: 2, 43, 3061

Why are those the prime factors of the number 8,423,872?

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 8,423,872

8,423,872
Factor Arrows
24,211,936
Factor Arrows
22,105,968
Factor Arrows
21,052,984
Factor Arrows
2526,492
Factor Arrows
2263,246
Factor Arrows
2131,623
Factor Arrows
433,061

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, 43, 3061

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 43 x 3,061 = 8,423,872

This can also be written as 26 x 431 x 3,0611 = 8,423,872

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


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