Q: What are the prime factors of the number 687,281,034?

 A: 2, 3, 11, 19, 29, 18899

Why are those the prime factors of the number 687,281,034?

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 687,281,034

687,281,034
Factor Arrows
2343,640,517
Factor Arrows
3114,546,839
Factor Arrows
1110,413,349
Factor Arrows
19548,071
Factor Arrows
2918,899

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, 19, 29, 18899

We can check our work by multiplying all of the prime factors together: 2 x 3 x 11 x 19 x 29 x 18,899 = 687,281,034

This can also be written as 21 x 31 x 111 x 191 x 291 x 18,8991 = 687,281,034

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


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