Q: What are the prime factors of the number 1,122,400?

 A: 2, 5, 23, 61

Why are those the prime factors of the number 1,122,400?

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 1,122,400

1,122,400
Factor Arrows
2561,200
Factor Arrows
2280,600
Factor Arrows
2140,300
Factor Arrows
270,150
Factor Arrows
235,075
Factor Arrows
57,015
Factor Arrows
51,403
Factor Arrows
2361

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, 23, 61

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 23 x 61 = 1,122,400

This can also be written as 25 x 52 x 231 x 611 = 1,122,400

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


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