Q: What are the prime factors of the number 326,674,278?

 A: 2, 3, 7, 17, 21787

Why are those the prime factors of the number 326,674,278?

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 326,674,278

326,674,278
Factor Arrows
2163,337,139
Factor Arrows
354,445,713
Factor Arrows
318,148,571
Factor Arrows
72,592,653
Factor Arrows
7370,379
Factor Arrows
1721,787

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, 7, 17, 21787

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 7 x 7 x 17 x 21,787 = 326,674,278

This can also be written as 21 x 32 x 72 x 171 x 21,7871 = 326,674,278

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


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