Q: What are the prime factors of the number 201,540,042?

 A: 2, 3, 11, 47, 7219

Why are those the prime factors of the number 201,540,042?

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 201,540,042

201,540,042
Factor Arrows
2100,770,021
Factor Arrows
333,590,007
Factor Arrows
311,196,669
Factor Arrows
33,732,223
Factor Arrows
11339,293
Factor Arrows
477,219

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, 11, 47, 7219

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 11 x 47 x 7,219 = 201,540,042

This can also be written as 21 x 33 x 111 x 471 x 7,2191 = 201,540,042

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


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