Q: What are the prime factors of the number 400,004,400?

 A: 2, 3, 5, 333337

Why are those the prime factors of the number 400,004,400?

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 400,004,400

400,004,400
Factor Arrows
2200,002,200
Factor Arrows
2100,001,100
Factor Arrows
250,000,550
Factor Arrows
225,000,275
Factor Arrows
38,333,425
Factor Arrows
51,666,685
Factor Arrows
5333,337

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, 5, 333337

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 5 x 333,337 = 400,004,400

This can also be written as 24 x 31 x 52 x 333,3371 = 400,004,400

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


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