Q: What are the prime factors of the number 321,033,408?

 A: 2, 3, 1129, 1481

Why are those the prime factors of the number 321,033,408?

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 321,033,408

321,033,408
Factor Arrows
2160,516,704
Factor Arrows
280,258,352
Factor Arrows
240,129,176
Factor Arrows
220,064,588
Factor Arrows
210,032,294
Factor Arrows
25,016,147
Factor Arrows
31,672,049
Factor Arrows
1,1291,481

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, 1129, 1481

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 1,129 x 1,481 = 321,033,408

This can also be written as 26 x 31 x 1,1291 x 1,4811 = 321,033,408

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


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