Q: What are the prime factors of the number 400,448?

 A: 2, 6257

Why are those the prime factors of the number 400,448?

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 400,448

400,448
Factor Arrows
2200,224
Factor Arrows
2100,112
Factor Arrows
250,056
Factor Arrows
225,028
Factor Arrows
212,514
Factor Arrows
26,257

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, 6257

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 6,257 = 400,448

This can also be written as 26 x 6,2571 = 400,448

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


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