Q: What are the prime factors of the number 400,536,704?

 A: 2, 3129193

Why are those the prime factors of the number 400,536,704?

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 400,536,704

400,536,704
Factor Arrows
2200,268,352
Factor Arrows
2100,134,176
Factor Arrows
250,067,088
Factor Arrows
225,033,544
Factor Arrows
212,516,772
Factor Arrows
26,258,386
Factor Arrows
23,129,193

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, 3129193

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 3,129,193 = 400,536,704

This can also be written as 27 x 3,129,1931 = 400,536,704

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


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