Q: What are the prime factors of the number 2,198,400?

 A: 2, 3, 5, 229

Why are those the prime factors of the number 2,198,400?

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 2,198,400

2,198,400
Factor Arrows
21,099,200
Factor Arrows
2549,600
Factor Arrows
2274,800
Factor Arrows
2137,400
Factor Arrows
268,700
Factor Arrows
234,350
Factor Arrows
217,175
Factor Arrows
35,725
Factor Arrows
51,145
Factor Arrows
5229

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, 5, 229

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 2 x 3 x 5 x 5 x 229 = 2,198,400

This can also be written as 27 x 31 x 52 x 2291 = 2,198,400

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


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