Q: What are the prime factors of the number 67,586,400?

 A: 2, 3, 5, 7, 149

Why are those the prime factors of the number 67,586,400?

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 67,586,400

67,586,400
Factor Arrows
233,793,200
Factor Arrows
216,896,600
Factor Arrows
28,448,300
Factor Arrows
24,224,150
Factor Arrows
22,112,075
Factor Arrows
3704,025
Factor Arrows
3234,675
Factor Arrows
378,225
Factor Arrows
326,075
Factor Arrows
55,215
Factor Arrows
51,043
Factor Arrows
7149

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, 7, 149

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 x 5 x 7 x 149 = 67,586,400

This can also be written as 25 x 34 x 52 x 71 x 1491 = 67,586,400

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


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