Q: What are the prime factors of the number 401,970?

 A: 2, 3, 5, 13399

Why are those the prime factors of the number 401,970?

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 401,970

401,970
Factor Arrows
2200,985
Factor Arrows
366,995
Factor Arrows
513,399

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, 13399

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 13,399 = 401,970

This can also be written as 21 x 31 x 51 x 13,3991 = 401,970

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


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