Q: What are the prime factors of the number 27,862,947?

 A: 3, 7, 157, 313

Why are those the prime factors of the number 27,862,947?

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 27,862,947

27,862,947
Factor Arrows
39,287,649
Factor Arrows
33,095,883
Factor Arrows
31,031,961
Factor Arrows
3343,987
Factor Arrows
749,141
Factor Arrows
157313

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:

3, 7, 157, 313

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 7 x 157 x 313 = 27,862,947

This can also be written as 34 x 71 x 1571 x 3131 = 27,862,947

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


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