Q: What are the prime factors of the number 408,002?

 A: 2, 7, 151, 193

Why are those the prime factors of the number 408,002?

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 408,002

408,002
Factor Arrows
2204,001
Factor Arrows
729,143
Factor Arrows
151193

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, 151, 193

We can check our work by multiplying all of the prime factors together: 2 x 7 x 151 x 193 = 408,002

This can also be written as 21 x 71 x 1511 x 1931 = 408,002

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


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