Q: What are the prime factors of the number 405,025,302?

 A: 2, 3, 11, 197, 31151

Why are those the prime factors of the number 405,025,302?

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 405,025,302

405,025,302
Factor Arrows
2202,512,651
Factor Arrows
367,504,217
Factor Arrows
116,136,747
Factor Arrows
19731,151

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, 11, 197, 31151

We can check our work by multiplying all of the prime factors together: 2 x 3 x 11 x 197 x 31,151 = 405,025,302

This can also be written as 21 x 31 x 111 x 1971 x 31,1511 = 405,025,302

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


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