Q: What are the prime factors of the number 55,431,680?

 A: 2, 5, 59, 367

Why are those the prime factors of the number 55,431,680?

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 55,431,680

55,431,680
Factor Arrows
227,715,840
Factor Arrows
213,857,920
Factor Arrows
26,928,960
Factor Arrows
23,464,480
Factor Arrows
21,732,240
Factor Arrows
2866,120
Factor Arrows
2433,060
Factor Arrows
2216,530
Factor Arrows
2108,265
Factor Arrows
521,653
Factor Arrows
59367

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, 59, 367

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 5 x 59 x 367 = 55,431,680

This can also be written as 29 x 51 x 591 x 3671 = 55,431,680

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


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