Q: What are the prime factors of the number 1,523,840?

 A: 2, 5, 2381

Why are those the prime factors of the number 1,523,840?

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 1,523,840

1,523,840
Factor Arrows
2761,920
Factor Arrows
2380,960
Factor Arrows
2190,480
Factor Arrows
295,240
Factor Arrows
247,620
Factor Arrows
223,810
Factor Arrows
211,905
Factor Arrows
52,381

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, 5, 2381

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 2 x 5 x 2,381 = 1,523,840

This can also be written as 27 x 51 x 2,3811 = 1,523,840

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


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