Q: What are the prime factors of the number 401,720,412?

 A: 2, 3, 29, 1154369

Why are those the prime factors of the number 401,720,412?

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 401,720,412

401,720,412
Factor Arrows
2200,860,206
Factor Arrows
2100,430,103
Factor Arrows
333,476,701
Factor Arrows
291,154,369

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, 29, 1154369

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 29 x 1,154,369 = 401,720,412

This can also be written as 22 x 31 x 291 x 1,154,3691 = 401,720,412

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


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