Q: What are the prime factors of the number 210,432?

 A: 2, 3, 137

Why are those the prime factors of the number 210,432?

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 210,432

210,432
Factor Arrows
2105,216
Factor Arrows
252,608
Factor Arrows
226,304
Factor Arrows
213,152
Factor Arrows
26,576
Factor Arrows
23,288
Factor Arrows
21,644
Factor Arrows
2822
Factor Arrows
2411
Factor Arrows
3137

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, 137

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 2 x 2 x 3 x 137 = 210,432

This can also be written as 29 x 31 x 1371 = 210,432

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


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