Q: What are the prime factors of the number 215,034,400?

 A: 2, 5, 7, 19, 43, 47

Why are those the prime factors of the number 215,034,400?

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 215,034,400

215,034,400
Factor Arrows
2107,517,200
Factor Arrows
253,758,600
Factor Arrows
226,879,300
Factor Arrows
213,439,650
Factor Arrows
26,719,825
Factor Arrows
51,343,965
Factor Arrows
5268,793
Factor Arrows
738,399
Factor Arrows
192,021
Factor Arrows
4347

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, 7, 19, 43, 47

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 7 x 19 x 43 x 47 = 215,034,400

This can also be written as 25 x 52 x 71 x 191 x 431 x 471 = 215,034,400

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


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