Q: What are the prime factors of the number 111,421,416?

 A: 2, 3, 409, 11351

Why are those the prime factors of the number 111,421,416?

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 111,421,416

111,421,416
Factor Arrows
255,710,708
Factor Arrows
227,855,354
Factor Arrows
213,927,677
Factor Arrows
34,642,559
Factor Arrows
40911,351

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, 409, 11351

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 409 x 11,351 = 111,421,416

This can also be written as 23 x 31 x 4091 x 11,3511 = 111,421,416

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


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