Q: What are the prime factors of the number 1,124,928?

 A: 2, 3, 7, 31

Why are those the prime factors of the number 1,124,928?

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 1,124,928

1,124,928
Factor Arrows
2562,464
Factor Arrows
2281,232
Factor Arrows
2140,616
Factor Arrows
270,308
Factor Arrows
235,154
Factor Arrows
217,577
Factor Arrows
35,859
Factor Arrows
31,953
Factor Arrows
3651
Factor Arrows
3217
Factor Arrows
731

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, 7, 31

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 3 x 3 x 3 x 3 x 7 x 31 = 1,124,928

This can also be written as 26 x 34 x 71 x 311 = 1,124,928

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


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