Q: What are the prime factors of the number 909,738?

 A: 2, 3, 17, 991

Why are those the prime factors of the number 909,738?

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 909,738

909,738
Factor Arrows
2454,869
Factor Arrows
3151,623
Factor Arrows
350,541
Factor Arrows
316,847
Factor Arrows
17991

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, 991

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 17 x 991 = 909,738

This can also be written as 21 x 33 x 171 x 9911 = 909,738

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


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