Q: What are the prime factors of the number 140,403,407?

 A: 19, 1987, 3719

Why are those the prime factors of the number 140,403,407?

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 140,403,407

140,403,407
Factor Arrows
197,389,653
Factor Arrows
1,9873,719

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:

19, 1987, 3719

We can check our work by multiplying all of the prime factors together: 19 x 1,987 x 3,719 = 140,403,407

This can also be written as 191 x 1,9871 x 3,7191 = 140,403,407

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


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