Q: What are the prime factors of the number 1,608,672?

 A: 2, 3, 13, 1289

Why are those the prime factors of the number 1,608,672?

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 1,608,672

1,608,672
Factor Arrows
2804,336
Factor Arrows
2402,168
Factor Arrows
2201,084
Factor Arrows
2100,542
Factor Arrows
250,271
Factor Arrows
316,757
Factor Arrows
131,289

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, 13, 1289

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 13 x 1,289 = 1,608,672

This can also be written as 25 x 31 x 131 x 1,2891 = 1,608,672

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


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