Q: What are the prime factors of the number 40,402,404?

 A: 2, 3, 7, 17, 9431

Why are those the prime factors of the number 40,402,404?

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 40,402,404

40,402,404
Factor Arrows
220,201,202
Factor Arrows
210,100,601
Factor Arrows
33,366,867
Factor Arrows
31,122,289
Factor Arrows
7160,327
Factor Arrows
179,431

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, 7, 17, 9431

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 7 x 17 x 9,431 = 40,402,404

This can also be written as 22 x 32 x 71 x 171 x 9,4311 = 40,402,404

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


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