Q: What are the prime factors of the number 7,915,840?

 A: 2, 5, 29, 853

Why are those the prime factors of the number 7,915,840?

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 7,915,840

7,915,840
Factor Arrows
23,957,920
Factor Arrows
21,978,960
Factor Arrows
2989,480
Factor Arrows
2494,740
Factor Arrows
2247,370
Factor Arrows
2123,685
Factor Arrows
524,737
Factor Arrows
29853

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, 29, 853

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 5 x 29 x 853 = 7,915,840

This can also be written as 26 x 51 x 291 x 8531 = 7,915,840

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


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