Q: What are the prime factors of the number 911,680?

 A: 2, 5, 7, 11, 37

Why are those the prime factors of the number 911,680?

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 911,680

911,680
Factor Arrows
2455,840
Factor Arrows
2227,920
Factor Arrows
2113,960
Factor Arrows
256,980
Factor Arrows
228,490
Factor Arrows
214,245
Factor Arrows
52,849
Factor Arrows
7407
Factor Arrows
1137

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, 5, 7, 11, 37

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 5 x 7 x 11 x 37 = 911,680

This can also be written as 26 x 51 x 71 x 111 x 371 = 911,680

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


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