Q: What are the prime factors of the number 863,040?

 A: 2, 3, 5, 29, 31

Why are those the prime factors of the number 863,040?

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 863,040

863,040
Factor Arrows
2431,520
Factor Arrows
2215,760
Factor Arrows
2107,880
Factor Arrows
253,940
Factor Arrows
226,970
Factor Arrows
213,485
Factor Arrows
34,495
Factor Arrows
5899
Factor Arrows
2931

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, 29, 31

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 3 x 5 x 29 x 31 = 863,040

This can also be written as 26 x 31 x 51 x 291 x 311 = 863,040

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


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