Q: What are the prime factors of the number 210,533,440?

 A: 2, 5, 13, 17, 229

Why are those the prime factors of the number 210,533,440?

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 210,533,440

210,533,440
Factor Arrows
2105,266,720
Factor Arrows
252,633,360
Factor Arrows
226,316,680
Factor Arrows
213,158,340
Factor Arrows
26,579,170
Factor Arrows
23,289,585
Factor Arrows
5657,917
Factor Arrows
1350,609
Factor Arrows
133,893
Factor Arrows
17229

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, 5, 13, 17, 229

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 5 x 13 x 13 x 17 x 229 = 210,533,440

This can also be written as 26 x 51 x 132 x 171 x 2291 = 210,533,440

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


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