Q: What are the prime factors of the number 306,721,446?

 A: 2, 3, 17, 19, 101, 1567

Why are those the prime factors of the number 306,721,446?

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 306,721,446

306,721,446
Factor Arrows
2153,360,723
Factor Arrows
351,120,241
Factor Arrows
173,007,073
Factor Arrows
19158,267
Factor Arrows
1011,567

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, 17, 19, 101, 1567

We can check our work by multiplying all of the prime factors together: 2 x 3 x 17 x 19 x 101 x 1,567 = 306,721,446

This can also be written as 21 x 31 x 171 x 191 x 1011 x 1,5671 = 306,721,446

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


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