Q: What are the prime factors of the number 1,838,240?

 A: 2, 5, 11489

Why are those the prime factors of the number 1,838,240?

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 1,838,240

1,838,240
Factor Arrows
2919,120
Factor Arrows
2459,560
Factor Arrows
2229,780
Factor Arrows
2114,890
Factor Arrows
257,445
Factor Arrows
511,489

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, 5, 11489

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 11,489 = 1,838,240

This can also be written as 25 x 51 x 11,4891 = 1,838,240

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


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