Q: What are the prime factors of the number 1,140,608?

 A: 2, 7, 19, 67

Why are those the prime factors of the number 1,140,608?

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 1,140,608

1,140,608
Factor Arrows
2570,304
Factor Arrows
2285,152
Factor Arrows
2142,576
Factor Arrows
271,288
Factor Arrows
235,644
Factor Arrows
217,822
Factor Arrows
28,911
Factor Arrows
71,273
Factor Arrows
1967

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, 7, 19, 67

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 7 x 19 x 67 = 1,140,608

This can also be written as 27 x 71 x 191 x 671 = 1,140,608

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


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