Q: What are the prime factors of the number 842,112?

 A: 2, 3, 17, 43

Why are those the prime factors of the number 842,112?

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 842,112

842,112
Factor Arrows
2421,056
Factor Arrows
2210,528
Factor Arrows
2105,264
Factor Arrows
252,632
Factor Arrows
226,316
Factor Arrows
213,158
Factor Arrows
26,579
Factor Arrows
32,193
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 3 x 3 x 17 x 43 = 842,112

This can also be written as 27 x 32 x 171 x 431 = 842,112

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


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