Q: What are the prime factors of the number 210,310,400?

 A: 2, 5, 17, 1933

Why are those the prime factors of the number 210,310,400?

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 210,310,400

210,310,400
Factor Arrows
2105,155,200
Factor Arrows
252,577,600
Factor Arrows
226,288,800
Factor Arrows
213,144,400
Factor Arrows
26,572,200
Factor Arrows
23,286,100
Factor Arrows
21,643,050
Factor Arrows
2821,525
Factor Arrows
5164,305
Factor Arrows
532,861
Factor Arrows
171,933

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, 17, 1933

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 5 x 5 x 17 x 1,933 = 210,310,400

This can also be written as 28 x 52 x 171 x 1,9331 = 210,310,400

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


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