Q: What are the prime factors of the number 7,858,920?

 A: 2, 3, 5, 79, 829

Why are those the prime factors of the number 7,858,920?

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 7,858,920

7,858,920
Factor Arrows
23,929,460
Factor Arrows
21,964,730
Factor Arrows
2982,365
Factor Arrows
3327,455
Factor Arrows
565,491
Factor Arrows
79829

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, 5, 79, 829

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 79 x 829 = 7,858,920

This can also be written as 23 x 31 x 51 x 791 x 8291 = 7,858,920

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


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