Q: What are the prime factors of the number 324,576?

 A: 2, 3, 7, 23

Why are those the prime factors of the number 324,576?

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 324,576

324,576
Factor Arrows
2162,288
Factor Arrows
281,144
Factor Arrows
240,572
Factor Arrows
220,286
Factor Arrows
210,143
Factor Arrows
33,381
Factor Arrows
31,127
Factor Arrows
7161
Factor Arrows
723

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, 7, 23

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 7 x 7 x 23 = 324,576

This can also be written as 25 x 32 x 72 x 231 = 324,576

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


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