Q: What are the prime factors of the number 400,440,250?

 A: 2, 5, 7, 97, 337

Why are those the prime factors of the number 400,440,250?

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 400,440,250

400,440,250
Factor Arrows
2200,220,125
Factor Arrows
540,044,025
Factor Arrows
58,008,805
Factor Arrows
51,601,761
Factor Arrows
7228,823
Factor Arrows
732,689
Factor Arrows
97337

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, 5, 7, 97, 337

We can check our work by multiplying all of the prime factors together: 2 x 5 x 5 x 5 x 7 x 7 x 97 x 337 = 400,440,250

This can also be written as 21 x 53 x 72 x 971 x 3371 = 400,440,250

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


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