Q: What are the prime factors of the number 381,744?

 A: 2, 3, 11, 241

Why are those the prime factors of the number 381,744?

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 381,744

381,744
Factor Arrows
2190,872
Factor Arrows
295,436
Factor Arrows
247,718
Factor Arrows
223,859
Factor Arrows
37,953
Factor Arrows
32,651
Factor Arrows
11241

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, 11, 241

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 11 x 241 = 381,744

This can also be written as 24 x 32 x 111 x 2411 = 381,744

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


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