Q: What are the prime factors of the number 1,145,856?

 A: 2, 3, 373

Why are those the prime factors of the number 1,145,856?

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 1,145,856

1,145,856
Factor Arrows
2572,928
Factor Arrows
2286,464
Factor Arrows
2143,232
Factor Arrows
271,616
Factor Arrows
235,808
Factor Arrows
217,904
Factor Arrows
28,952
Factor Arrows
24,476
Factor Arrows
22,238
Factor Arrows
21,119
Factor Arrows
3373

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, 373

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 2 x 2 x 2 x 2 x 3 x 373 = 1,145,856

This can also be written as 210 x 31 x 3731 = 1,145,856

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


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