Q: What are the prime factors of the number 405,023,355?

 A: 3, 5, 11, 107, 2549

Why are those the prime factors of the number 405,023,355?

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 405,023,355

405,023,355
Factor Arrows
3135,007,785
Factor Arrows
345,002,595
Factor Arrows
315,000,865
Factor Arrows
53,000,173
Factor Arrows
11272,743
Factor Arrows
1072,549

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:

3, 5, 11, 107, 2549

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 5 x 11 x 107 x 2,549 = 405,023,355

This can also be written as 33 x 51 x 111 x 1071 x 2,5491 = 405,023,355

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


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