Q: What are the prime factors of the number 18,401,280?

 A: 2, 3, 5, 599

Why are those the prime factors of the number 18,401,280?

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 18,401,280

18,401,280
Factor Arrows
29,200,640
Factor Arrows
24,600,320
Factor Arrows
22,300,160
Factor Arrows
21,150,080
Factor Arrows
2575,040
Factor Arrows
2287,520
Factor Arrows
2143,760
Factor Arrows
271,880
Factor Arrows
235,940
Factor Arrows
217,970
Factor Arrows
28,985
Factor Arrows
32,995
Factor Arrows
5599

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, 5, 599

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 5 x 599 = 18,401,280

This can also be written as 211 x 31 x 51 x 5991 = 18,401,280

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


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