Q: What are the prime factors of the number 403,033,320?

 A: 2, 3, 5, 19, 6547

Why are those the prime factors of the number 403,033,320?

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 403,033,320

403,033,320
Factor Arrows
2201,516,660
Factor Arrows
2100,758,330
Factor Arrows
250,379,165
Factor Arrows
316,793,055
Factor Arrows
35,597,685
Factor Arrows
31,865,895
Factor Arrows
3621,965
Factor Arrows
5124,393
Factor Arrows
196,547

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, 19, 6547

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 x 19 x 6,547 = 403,033,320

This can also be written as 23 x 34 x 51 x 191 x 6,5471 = 403,033,320

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


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