Q: What are the prime factors of the number 8,729,378?

 A: 2, 7, 277, 2251

Why are those the prime factors of the number 8,729,378?

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 8,729,378

8,729,378
Factor Arrows
24,364,689
Factor Arrows
7623,527
Factor Arrows
2772,251

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, 277, 2251

We can check our work by multiplying all of the prime factors together: 2 x 7 x 277 x 2,251 = 8,729,378

This can also be written as 21 x 71 x 2771 x 2,2511 = 8,729,378

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


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