Q: What are the prime factors of the number 55,136,320?

 A: 2, 5, 43, 4007

Why are those the prime factors of the number 55,136,320?

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 55,136,320

55,136,320
Factor Arrows
227,568,160
Factor Arrows
213,784,080
Factor Arrows
26,892,040
Factor Arrows
23,446,020
Factor Arrows
21,723,010
Factor Arrows
2861,505
Factor Arrows
5172,301
Factor Arrows
434,007

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, 43, 4007

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 5 x 43 x 4,007 = 55,136,320

This can also be written as 26 x 51 x 431 x 4,0071 = 55,136,320

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


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