Q: What are the prime factors of the number 1,223,200?

 A: 2, 5, 11, 139

Why are those the prime factors of the number 1,223,200?

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 1,223,200

1,223,200
Factor Arrows
2611,600
Factor Arrows
2305,800
Factor Arrows
2152,900
Factor Arrows
276,450
Factor Arrows
238,225
Factor Arrows
57,645
Factor Arrows
51,529
Factor Arrows
11139

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, 139

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 11 x 139 = 1,223,200

This can also be written as 25 x 52 x 111 x 1391 = 1,223,200

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


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