Q: What are the prime factors of the number 1,903,473?

 A: 3, 11, 13, 17, 29

Why are those the prime factors of the number 1,903,473?

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 1,903,473

1,903,473
Factor Arrows
3634,491
Factor Arrows
3211,497
Factor Arrows
370,499
Factor Arrows
116,409
Factor Arrows
13493
Factor Arrows
1729

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:

3, 11, 13, 17, 29

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 11 x 13 x 17 x 29 = 1,903,473

This can also be written as 33 x 111 x 131 x 171 x 291 = 1,903,473

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


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