Q: What are the prime factors of the number 61,776?

 A: 2, 3, 11, 13

Why are those the prime factors of the number 61,776?

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 61,776

61,776
Factor Arrows
230,888
Factor Arrows
215,444
Factor Arrows
27,722
Factor Arrows
23,861
Factor Arrows
31,287
Factor Arrows
3429
Factor Arrows
3143
Factor Arrows
1113

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, 13

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 11 x 13 = 61,776

This can also be written as 24 x 33 x 111 x 131 = 61,776

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


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