Q: What are the prime factors of the number 537,216?

 A: 2, 3, 1399

Why are those the prime factors of the number 537,216?

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 537,216

537,216
Factor Arrows
2268,608
Factor Arrows
2134,304
Factor Arrows
267,152
Factor Arrows
233,576
Factor Arrows
216,788
Factor Arrows
28,394
Factor Arrows
24,197
Factor Arrows
31,399

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, 1399

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 3 x 1,399 = 537,216

This can also be written as 27 x 31 x 1,3991 = 537,216

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


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