Q: What are the prime factors of the number 1,125,168?

 A: 2, 3, 11, 2131

Why are those the prime factors of the number 1,125,168?

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 1,125,168

1,125,168
Factor Arrows
2562,584
Factor Arrows
2281,292
Factor Arrows
2140,646
Factor Arrows
270,323
Factor Arrows
323,441
Factor Arrows
112,131

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, 2131

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 11 x 2,131 = 1,125,168

This can also be written as 24 x 31 x 111 x 2,1311 = 1,125,168

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


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