Q: What are the prime factors of the number 42,256,016?

 A: 2, 11, 17, 29, 487

Why are those the prime factors of the number 42,256,016?

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 42,256,016

42,256,016
Factor Arrows
221,128,008
Factor Arrows
210,564,004
Factor Arrows
25,282,002
Factor Arrows
22,641,001
Factor Arrows
11240,091
Factor Arrows
1714,123
Factor Arrows
29487

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, 11, 17, 29, 487

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 11 x 17 x 29 x 487 = 42,256,016

This can also be written as 24 x 111 x 171 x 291 x 4871 = 42,256,016

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


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