Q: What are the prime factors of the number 401,400,250?

 A: 2, 5, 41, 39161

Why are those the prime factors of the number 401,400,250?

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 401,400,250

401,400,250
Factor Arrows
2200,700,125
Factor Arrows
540,140,025
Factor Arrows
58,028,005
Factor Arrows
51,605,601
Factor Arrows
4139,161

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, 41, 39161

We can check our work by multiplying all of the prime factors together: 2 x 5 x 5 x 5 x 41 x 39,161 = 401,400,250

This can also be written as 21 x 53 x 411 x 39,1611 = 401,400,250

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


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