Q: What are the prime factors of the number 403,055,550?

 A: 2, 3, 5, 17, 19, 47, 59

Why are those the prime factors of the number 403,055,550?

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 403,055,550

403,055,550
Factor Arrows
2201,527,775
Factor Arrows
367,175,925
Factor Arrows
322,391,975
Factor Arrows
54,478,395
Factor Arrows
5895,679
Factor Arrows
1752,687
Factor Arrows
192,773
Factor Arrows
4759

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, 17, 19, 47, 59

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 5 x 17 x 19 x 47 x 59 = 403,055,550

This can also be written as 21 x 32 x 52 x 171 x 191 x 471 x 591 = 403,055,550

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


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