Q: What are the prime factors of the number 17,665,536?

 A: 2, 3, 7, 31, 53

Why are those the prime factors of the number 17,665,536?

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 17,665,536

17,665,536
Factor Arrows
28,832,768
Factor Arrows
24,416,384
Factor Arrows
22,208,192
Factor Arrows
21,104,096
Factor Arrows
2552,048
Factor Arrows
2276,024
Factor Arrows
2138,012
Factor Arrows
269,006
Factor Arrows
234,503
Factor Arrows
311,501
Factor Arrows
71,643
Factor Arrows
3153

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, 7, 31, 53

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 7 x 31 x 53 = 17,665,536

This can also be written as 29 x 31 x 71 x 311 x 531 = 17,665,536

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


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