Q: What are the prime factors of the number 644,352?

 A: 2, 3, 839

Why are those the prime factors of the number 644,352?

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 644,352

644,352
Factor Arrows
2322,176
Factor Arrows
2161,088
Factor Arrows
280,544
Factor Arrows
240,272
Factor Arrows
220,136
Factor Arrows
210,068
Factor Arrows
25,034
Factor Arrows
22,517
Factor Arrows
3839

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, 839

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 2 x 2 x 3 x 839 = 644,352

This can also be written as 28 x 31 x 8391 = 644,352

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


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