Q: What are the prime factors of the number 1,180,608?

 A: 2, 3, 11, 13, 43

Why are those the prime factors of the number 1,180,608?

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 1,180,608

1,180,608
Factor Arrows
2590,304
Factor Arrows
2295,152
Factor Arrows
2147,576
Factor Arrows
273,788
Factor Arrows
236,894
Factor Arrows
218,447
Factor Arrows
36,149
Factor Arrows
11559
Factor Arrows
1343

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, 11, 13, 43

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 11 x 13 x 43 = 1,180,608

This can also be written as 26 x 31 x 111 x 131 x 431 = 1,180,608

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


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