Q: What are the prime factors of the number 405,102,120?

 A: 2, 3, 5, 1447, 2333

Why are those the prime factors of the number 405,102,120?

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 405,102,120

405,102,120
Factor Arrows
2202,551,060
Factor Arrows
2101,275,530
Factor Arrows
250,637,765
Factor Arrows
316,879,255
Factor Arrows
53,375,851
Factor Arrows
1,4472,333

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, 1447, 2333

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 1,447 x 2,333 = 405,102,120

This can also be written as 23 x 31 x 51 x 1,4471 x 2,3331 = 405,102,120

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


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