Q: What are the prime factors of the number 1,231,840?

 A: 2, 5, 7699

Why are those the prime factors of the number 1,231,840?

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 1,231,840

1,231,840
Factor Arrows
2615,920
Factor Arrows
2307,960
Factor Arrows
2153,980
Factor Arrows
276,990
Factor Arrows
238,495
Factor Arrows
57,699

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, 7699

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 7,699 = 1,231,840

This can also be written as 25 x 51 x 7,6991 = 1,231,840

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


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