Q: What are the prime factors of the number 168,097,728?

 A: 2, 3, 875509

Why are those the prime factors of the number 168,097,728?

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 168,097,728

168,097,728
Factor Arrows
284,048,864
Factor Arrows
242,024,432
Factor Arrows
221,012,216
Factor Arrows
210,506,108
Factor Arrows
25,253,054
Factor Arrows
22,626,527
Factor Arrows
3875,509

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, 875509

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 875,509 = 168,097,728

This can also be written as 26 x 31 x 875,5091 = 168,097,728

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


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