Q: What are the prime factors of the number 18,352,128?

 A: 2, 3, 29, 103

Why are those the prime factors of the number 18,352,128?

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 18,352,128

18,352,128
Factor Arrows
29,176,064
Factor Arrows
24,588,032
Factor Arrows
22,294,016
Factor Arrows
21,147,008
Factor Arrows
2573,504
Factor Arrows
2286,752
Factor Arrows
2143,376
Factor Arrows
271,688
Factor Arrows
235,844
Factor Arrows
217,922
Factor Arrows
28,961
Factor Arrows
32,987
Factor Arrows
29103

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, 29, 103

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 3 x 29 x 103 = 18,352,128

This can also be written as 211 x 31 x 291 x 1031 = 18,352,128

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


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