Q: What are the prime factors of the number 1,166,400?

 A: 2, 3, 5

Why are those the prime factors of the number 1,166,400?

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 1,166,400

1,166,400
Factor Arrows
2583,200
Factor Arrows
2291,600
Factor Arrows
2145,800
Factor Arrows
272,900
Factor Arrows
236,450
Factor Arrows
218,225
Factor Arrows
36,075
Factor Arrows
32,025
Factor Arrows
3675
Factor Arrows
3225
Factor Arrows
375
Factor Arrows
325
Factor Arrows
55

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

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 3 x 3 x 3 x 3 x 3 x 3 x 5 x 5 = 1,166,400

This can also be written as 26 x 36 x 52 = 1,166,400

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


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