Q: What are the prime factors of the number 40,134,304?

 A: 2, 7, 139, 1289

Why are those the prime factors of the number 40,134,304?

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 40,134,304

40,134,304
Factor Arrows
220,067,152
Factor Arrows
210,033,576
Factor Arrows
25,016,788
Factor Arrows
22,508,394
Factor Arrows
21,254,197
Factor Arrows
7179,171
Factor Arrows
1391,289

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, 7, 139, 1289

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 139 x 1,289 = 40,134,304

This can also be written as 25 x 71 x 1391 x 1,2891 = 40,134,304

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


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