Q: What are the prime factors of the number 405,488?

 A: 2, 25343

Why are those the prime factors of the number 405,488?

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 405,488

405,488
Factor Arrows
2202,744
Factor Arrows
2101,372
Factor Arrows
250,686
Factor Arrows
225,343

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, 25343

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 25,343 = 405,488

This can also be written as 24 x 25,3431 = 405,488

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


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