Q: What are the prime factors of the number 440,031,312?

 A: 2, 3, 7, 145513

Why are those the prime factors of the number 440,031,312?

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 440,031,312

440,031,312
Factor Arrows
2220,015,656
Factor Arrows
2110,007,828
Factor Arrows
255,003,914
Factor Arrows
227,501,957
Factor Arrows
39,167,319
Factor Arrows
33,055,773
Factor Arrows
31,018,591
Factor Arrows
7145,513

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, 145513

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 7 x 145,513 = 440,031,312

This can also be written as 24 x 33 x 71 x 145,5131 = 440,031,312

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


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