Q: What are the prime factors of the number 3,238,816?

 A: 2, 7, 19, 761

Why are those the prime factors of the number 3,238,816?

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 3,238,816

3,238,816
Factor Arrows
21,619,408
Factor Arrows
2809,704
Factor Arrows
2404,852
Factor Arrows
2202,426
Factor Arrows
2101,213
Factor Arrows
714,459
Factor Arrows
19761

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, 7, 19, 761

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 19 x 761 = 3,238,816

This can also be written as 25 x 71 x 191 x 7611 = 3,238,816

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


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