Q: What are the prime factors of the number 399,265,794?

 A: 2, 3, 29, 254959

Why are those the prime factors of the number 399,265,794?

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 399,265,794

399,265,794
Factor Arrows
2199,632,897
Factor Arrows
366,544,299
Factor Arrows
322,181,433
Factor Arrows
37,393,811
Factor Arrows
29254,959

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, 29, 254959

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 29 x 254,959 = 399,265,794

This can also be written as 21 x 33 x 291 x 254,9591 = 399,265,794

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


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