Q: What are the prime factors of the number 1,100,000?

 A: 2, 5, 11

Why are those the prime factors of the number 1,100,000?

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 1,100,000

1,100,000
Factor Arrows
2550,000
Factor Arrows
2275,000
Factor Arrows
2137,500
Factor Arrows
268,750
Factor Arrows
234,375
Factor Arrows
56,875
Factor Arrows
51,375
Factor Arrows
5275
Factor Arrows
555
Factor Arrows
511

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, 11

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 5 x 5 x 5 x 11 = 1,100,000

This can also be written as 25 x 55 x 111 = 1,100,000

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


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