Q: What are the prime factors of the number 17,758,208?

 A: 2, 13, 23, 29

Why are those the prime factors of the number 17,758,208?

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 17,758,208

17,758,208
Factor Arrows
28,879,104
Factor Arrows
24,439,552
Factor Arrows
22,219,776
Factor Arrows
21,109,888
Factor Arrows
2554,944
Factor Arrows
2277,472
Factor Arrows
2138,736
Factor Arrows
269,368
Factor Arrows
234,684
Factor Arrows
217,342
Factor Arrows
28,671
Factor Arrows
13667
Factor Arrows
2329

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, 13, 23, 29

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 2 x 13 x 23 x 29 = 17,758,208

This can also be written as 211 x 131 x 231 x 291 = 17,758,208

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


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