Q: What are the prime factors of the number 403,104?

 A: 2, 3, 13, 17, 19

Why are those the prime factors of the number 403,104?

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 403,104

403,104
Factor Arrows
2201,552
Factor Arrows
2100,776
Factor Arrows
250,388
Factor Arrows
225,194
Factor Arrows
212,597
Factor Arrows
34,199
Factor Arrows
13323
Factor Arrows
1719

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, 13, 17, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 13 x 17 x 19 = 403,104

This can also be written as 25 x 31 x 131 x 171 x 191 = 403,104

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


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