Q: What are the prime factors of the number 401,314,342?

 A: 2, 11, 13, 17, 59, 1399

Why are those the prime factors of the number 401,314,342?

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 401,314,342

401,314,342
Factor Arrows
2200,657,171
Factor Arrows
1118,241,561
Factor Arrows
131,403,197
Factor Arrows
1782,541
Factor Arrows
591,399

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, 11, 13, 17, 59, 1399

We can check our work by multiplying all of the prime factors together: 2 x 11 x 13 x 17 x 59 x 1,399 = 401,314,342

This can also be written as 21 x 111 x 131 x 171 x 591 x 1,3991 = 401,314,342

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


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