Q: What are the prime factors of the number 1,388,544?

 A: 2, 3, 113

Why are those the prime factors of the number 1,388,544?

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 1,388,544

1,388,544
Factor Arrows
2694,272
Factor Arrows
2347,136
Factor Arrows
2173,568
Factor Arrows
286,784
Factor Arrows
243,392
Factor Arrows
221,696
Factor Arrows
210,848
Factor Arrows
25,424
Factor Arrows
22,712
Factor Arrows
21,356
Factor Arrows
2678
Factor Arrows
2339
Factor Arrows
3113

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, 113

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 2 x 2 x 2 x 2 x 2 x 3 x 113 = 1,388,544

This can also be written as 212 x 31 x 1131 = 1,388,544

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


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