Q: What are the prime factors of the number 840,384?

 A: 2, 3, 1459

Why are those the prime factors of the number 840,384?

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 840,384

840,384
Factor Arrows
2420,192
Factor Arrows
2210,096
Factor Arrows
2105,048
Factor Arrows
252,524
Factor Arrows
226,262
Factor Arrows
213,131
Factor Arrows
34,377
Factor Arrows
31,459

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, 3, 1459

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 3 x 3 x 1,459 = 840,384

This can also be written as 26 x 32 x 1,4591 = 840,384

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


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