Q: What are the prime factors of the number 31,742,502?

 A: 2, 3, 11, 17, 19, 1489

Why are those the prime factors of the number 31,742,502?

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 31,742,502

31,742,502
Factor Arrows
215,871,251
Factor Arrows
35,290,417
Factor Arrows
11480,947
Factor Arrows
1728,291
Factor Arrows
191,489

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, 3, 11, 17, 19, 1489

We can check our work by multiplying all of the prime factors together: 2 x 3 x 11 x 17 x 19 x 1,489 = 31,742,502

This can also be written as 21 x 31 x 111 x 171 x 191 x 1,4891 = 31,742,502

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


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