Q: What are the prime factors of the number 1,122,816?

 A: 2, 3, 17, 43

Why are those the prime factors of the number 1,122,816?

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 1,122,816

1,122,816
Factor Arrows
2561,408
Factor Arrows
2280,704
Factor Arrows
2140,352
Factor Arrows
270,176
Factor Arrows
235,088
Factor Arrows
217,544
Factor Arrows
28,772
Factor Arrows
24,386
Factor Arrows
22,193
Factor Arrows
3731
Factor Arrows
1743

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, 17, 43

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 3 x 17 x 43 = 1,122,816

This can also be written as 29 x 31 x 171 x 431 = 1,122,816

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


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