Q: What are the prime factors of the number 201,331,200?

 A: 2, 3, 5, 7, 107

Why are those the prime factors of the number 201,331,200?

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 201,331,200

201,331,200
Factor Arrows
2100,665,600
Factor Arrows
250,332,800
Factor Arrows
225,166,400
Factor Arrows
212,583,200
Factor Arrows
26,291,600
Factor Arrows
23,145,800
Factor Arrows
21,572,900
Factor Arrows
2786,450
Factor Arrows
2393,225
Factor Arrows
3131,075
Factor Arrows
526,215
Factor Arrows
55,243
Factor Arrows
7749
Factor Arrows
7107

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, 5, 7, 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 2 x 3 x 5 x 5 x 7 x 7 x 107 = 201,331,200

This can also be written as 29 x 31 x 52 x 72 x 1071 = 201,331,200

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


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