Q: What are the prime factors of the number 40,992?

 A: 2, 3, 7, 61

Why are those the prime factors of the number 40,992?

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 40,992

40,992
Factor Arrows
220,496
Factor Arrows
210,248
Factor Arrows
25,124
Factor Arrows
22,562
Factor Arrows
21,281
Factor Arrows
3427
Factor Arrows
761

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, 61

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 61 = 40,992

This can also be written as 25 x 31 x 71 x 611 = 40,992

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


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