Q: What are the prime factors of the number 3,214,400?

 A: 2, 5, 7, 41

Why are those the prime factors of the number 3,214,400?

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 3,214,400

3,214,400
Factor Arrows
21,607,200
Factor Arrows
2803,600
Factor Arrows
2401,800
Factor Arrows
2200,900
Factor Arrows
2100,450
Factor Arrows
250,225
Factor Arrows
510,045
Factor Arrows
52,009
Factor Arrows
7287
Factor Arrows
741

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, 7, 41

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 5 x 5 x 7 x 7 x 41 = 3,214,400

This can also be written as 26 x 52 x 72 x 411 = 3,214,400

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


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