Q: What are the prime factors of the number 4,256,000?

 A: 2, 5, 7, 19

Why are those the prime factors of the number 4,256,000?

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 4,256,000

4,256,000
Factor Arrows
22,128,000
Factor Arrows
21,064,000
Factor Arrows
2532,000
Factor Arrows
2266,000
Factor Arrows
2133,000
Factor Arrows
266,500
Factor Arrows
233,250
Factor Arrows
216,625
Factor Arrows
53,325
Factor Arrows
5665
Factor Arrows
5133
Factor Arrows
719

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

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 5 x 7 x 19 = 4,256,000

This can also be written as 28 x 53 x 71 x 191 = 4,256,000

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


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