Q: What are the prime factors of the number 215,545,344?

 A: 2, 3, 7, 20047

Why are those the prime factors of the number 215,545,344?

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 215,545,344

215,545,344
Factor Arrows
2107,772,672
Factor Arrows
253,886,336
Factor Arrows
226,943,168
Factor Arrows
213,471,584
Factor Arrows
26,735,792
Factor Arrows
23,367,896
Factor Arrows
21,683,948
Factor Arrows
2841,974
Factor Arrows
2420,987
Factor Arrows
3140,329
Factor Arrows
720,047

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, 7, 20047

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 7 x 20,047 = 215,545,344

This can also be written as 29 x 31 x 71 x 20,0471 = 215,545,344

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


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