Q: What are the prime factors of the number 45,857,760?

 A: 2, 3, 5, 13, 7349

Why are those the prime factors of the number 45,857,760?

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 45,857,760

45,857,760
Factor Arrows
222,928,880
Factor Arrows
211,464,440
Factor Arrows
25,732,220
Factor Arrows
22,866,110
Factor Arrows
21,433,055
Factor Arrows
3477,685
Factor Arrows
595,537
Factor Arrows
137,349

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, 7349

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 7,349 = 45,857,760

This can also be written as 25 x 31 x 51 x 131 x 7,3491 = 45,857,760

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


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