Q: What are the prime factors of the number 383,040?

 A: 2, 3, 5, 7, 19

Why are those the prime factors of the number 383,040?

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 383,040

383,040
Factor Arrows
2191,520
Factor Arrows
295,760
Factor Arrows
247,880
Factor Arrows
223,940
Factor Arrows
211,970
Factor Arrows
25,985
Factor Arrows
31,995
Factor Arrows
3665
Factor Arrows
5133
Factor Arrows
719

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, 7, 19

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 3 x 5 x 7 x 19 = 383,040

This can also be written as 26 x 32 x 51 x 71 x 191 = 383,040

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


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