Q: What are the prime factors of the number 7,021,408?

 A: 2, 17, 12907

Why are those the prime factors of the number 7,021,408?

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 7,021,408

7,021,408
Factor Arrows
23,510,704
Factor Arrows
21,755,352
Factor Arrows
2877,676
Factor Arrows
2438,838
Factor Arrows
2219,419
Factor Arrows
1712,907

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, 17, 12907

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 17 x 12,907 = 7,021,408

This can also be written as 25 x 171 x 12,9071 = 7,021,408

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


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