Q: What are the prime factors of the number 42,325,416?

 A: 2, 3, 7, 31, 43

Why are those the prime factors of the number 42,325,416?

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 42,325,416

42,325,416
Factor Arrows
221,162,708
Factor Arrows
210,581,354
Factor Arrows
25,290,677
Factor Arrows
31,763,559
Factor Arrows
3587,853
Factor Arrows
3195,951
Factor Arrows
365,317
Factor Arrows
79,331
Factor Arrows
71,333
Factor Arrows
3143

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, 31, 43

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 7 x 7 x 31 x 43 = 42,325,416

This can also be written as 23 x 34 x 72 x 311 x 431 = 42,325,416

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


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