Q: What are the prime factors of the number 402,944?

 A: 2, 787

Why are those the prime factors of the number 402,944?

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 402,944

402,944
Factor Arrows
2201,472
Factor Arrows
2100,736
Factor Arrows
250,368
Factor Arrows
225,184
Factor Arrows
212,592
Factor Arrows
26,296
Factor Arrows
23,148
Factor Arrows
21,574
Factor Arrows
2787

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, 787

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 787 = 402,944

This can also be written as 29 x 7871 = 402,944

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


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