Q: What are the prime factors of the number 8,351,392?

 A: 2, 7, 23, 1621

Why are those the prime factors of the number 8,351,392?

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 8,351,392

8,351,392
Factor Arrows
24,175,696
Factor Arrows
22,087,848
Factor Arrows
21,043,924
Factor Arrows
2521,962
Factor Arrows
2260,981
Factor Arrows
737,283
Factor Arrows
231,621

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, 7, 23, 1621

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 23 x 1,621 = 8,351,392

This can also be written as 25 x 71 x 231 x 1,6211 = 8,351,392

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


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