Q: What are the prime factors of the number 3,840,624?

 A: 2, 3, 149, 179

Why are those the prime factors of the number 3,840,624?

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 3,840,624

3,840,624
Factor Arrows
21,920,312
Factor Arrows
2960,156
Factor Arrows
2480,078
Factor Arrows
2240,039
Factor Arrows
380,013
Factor Arrows
326,671
Factor Arrows
149179

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, 149, 179

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 149 x 179 = 3,840,624

This can also be written as 24 x 32 x 1491 x 1791 = 3,840,624

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


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