Q: What are the prime factors of the number 3,797,920?

 A: 2, 5, 7, 3391

Why are those the prime factors of the number 3,797,920?

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 3,797,920

3,797,920
Factor Arrows
21,898,960
Factor Arrows
2949,480
Factor Arrows
2474,740
Factor Arrows
2237,370
Factor Arrows
2118,685
Factor Arrows
523,737
Factor Arrows
73,391

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, 7, 3391

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 7 x 3,391 = 3,797,920

This can also be written as 25 x 51 x 71 x 3,3911 = 3,797,920

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


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