Q: What are the prime factors of the number 426,630,400?

 A: 2, 5, 7, 89, 107

Why are those the prime factors of the number 426,630,400?

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 426,630,400

426,630,400
Factor Arrows
2213,315,200
Factor Arrows
2106,657,600
Factor Arrows
253,328,800
Factor Arrows
226,664,400
Factor Arrows
213,332,200
Factor Arrows
26,666,100
Factor Arrows
23,333,050
Factor Arrows
21,666,525
Factor Arrows
5333,305
Factor Arrows
566,661
Factor Arrows
79,523
Factor Arrows
89107

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, 89, 107

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 7 x 89 x 107 = 426,630,400

This can also be written as 28 x 52 x 71 x 891 x 1071 = 426,630,400

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


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