Q: What are the prime factors of the number 405,023,346?

 A: 2, 3, 7, 13, 47, 5261

Why are those the prime factors of the number 405,023,346?

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 405,023,346

405,023,346
Factor Arrows
2202,511,673
Factor Arrows
367,503,891
Factor Arrows
322,501,297
Factor Arrows
73,214,471
Factor Arrows
13247,267
Factor Arrows
475,261

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, 7, 13, 47, 5261

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 7 x 13 x 47 x 5,261 = 405,023,346

This can also be written as 21 x 32 x 71 x 131 x 471 x 5,2611 = 405,023,346

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


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