Q: What are the prime factors of the number 400,233,134?

 A: 2, 7, 127, 163, 1381

Why are those the prime factors of the number 400,233,134?

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 400,233,134

400,233,134
Factor Arrows
2200,116,567
Factor Arrows
728,588,081
Factor Arrows
127225,103
Factor Arrows
1631,381

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, 7, 127, 163, 1381

We can check our work by multiplying all of the prime factors together: 2 x 7 x 127 x 163 x 1,381 = 400,233,134

This can also be written as 21 x 71 x 1271 x 1631 x 1,3811 = 400,233,134

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


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