Q: What are the prime factors of the number 3,871,719?

 A: 3, 47, 113

Why are those the prime factors of the number 3,871,719?

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 3,871,719

3,871,719
Factor Arrows
31,290,573
Factor Arrows
3430,191
Factor Arrows
3143,397
Factor Arrows
347,799
Factor Arrows
315,933
Factor Arrows
35,311
Factor Arrows
47113

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:

3, 47, 113

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 3 x 47 x 113 = 3,871,719

This can also be written as 36 x 471 x 1131 = 3,871,719

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


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