Q: What are the prime factors of the number 28,686,861?

 A: 3, 7, 283, 1609

Why are those the prime factors of the number 28,686,861?

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 28,686,861

28,686,861
Factor Arrows
39,562,287
Factor Arrows
33,187,429
Factor Arrows
7455,347
Factor Arrows
2831,609

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, 283, 1609

We can check our work by multiplying all of the prime factors together: 3 x 3 x 7 x 283 x 1,609 = 28,686,861

This can also be written as 32 x 71 x 2831 x 1,6091 = 28,686,861

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


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