Q: What are the prime factors of the number 54,356,640?

 A: 2, 3, 5, 13, 31, 281

Why are those the prime factors of the number 54,356,640?

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 54,356,640

54,356,640
Factor Arrows
227,178,320
Factor Arrows
213,589,160
Factor Arrows
26,794,580
Factor Arrows
23,397,290
Factor Arrows
21,698,645
Factor Arrows
3566,215
Factor Arrows
5113,243
Factor Arrows
138,711
Factor Arrows
31281

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, 13, 31, 281

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 5 x 13 x 31 x 281 = 54,356,640

This can also be written as 25 x 31 x 51 x 131 x 311 x 2811 = 54,356,640

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


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