Q: What are the prime factors of the number 411,600,420?

 A: 2, 3, 5, 7, 11, 19, 521

Why are those the prime factors of the number 411,600,420?

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 411,600,420

411,600,420
Factor Arrows
2205,800,210
Factor Arrows
2102,900,105
Factor Arrows
334,300,035
Factor Arrows
311,433,345
Factor Arrows
33,811,115
Factor Arrows
5762,223
Factor Arrows
7108,889
Factor Arrows
119,899
Factor Arrows
19521

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, 7, 11, 19, 521

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 5 x 7 x 11 x 19 x 521 = 411,600,420

This can also be written as 22 x 33 x 51 x 71 x 111 x 191 x 5211 = 411,600,420

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


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