Q: What are the prime factors of the number 675,648?

 A: 2, 3, 17, 23

Why are those the prime factors of the number 675,648?

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 675,648

675,648
Factor Arrows
2337,824
Factor Arrows
2168,912
Factor Arrows
284,456
Factor Arrows
242,228
Factor Arrows
221,114
Factor Arrows
210,557
Factor Arrows
33,519
Factor Arrows
31,173
Factor Arrows
3391
Factor Arrows
1723

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, 17, 23

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 3 x 17 x 23 = 675,648

This can also be written as 26 x 33 x 171 x 231 = 675,648

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


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