Q: What are the prime factors of the number 213,251,535?

 A: 3, 5, 7, 19, 37, 107

Why are those the prime factors of the number 213,251,535?

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 213,251,535

213,251,535
Factor Arrows
371,083,845
Factor Arrows
323,694,615
Factor Arrows
37,898,205
Factor Arrows
32,632,735
Factor Arrows
5526,547
Factor Arrows
775,221
Factor Arrows
193,959
Factor Arrows
37107

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:

3, 5, 7, 19, 37, 107

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 5 x 7 x 19 x 37 x 107 = 213,251,535

This can also be written as 34 x 51 x 71 x 191 x 371 x 1071 = 213,251,535

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


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