Q: What are the prime factors of the number 1,978,944?

 A: 2, 3, 11, 937

Why are those the prime factors of the number 1,978,944?

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 1,978,944

1,978,944
Factor Arrows
2989,472
Factor Arrows
2494,736
Factor Arrows
2247,368
Factor Arrows
2123,684
Factor Arrows
261,842
Factor Arrows
230,921
Factor Arrows
310,307
Factor Arrows
11937

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, 937

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 937 = 1,978,944

This can also be written as 26 x 31 x 111 x 9371 = 1,978,944

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


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