Q: What are the prime factors of the number 78,848?

 A: 2, 7, 11

Why are those the prime factors of the number 78,848?

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 78,848

78,848
Factor Arrows
239,424
Factor Arrows
219,712
Factor Arrows
29,856
Factor Arrows
24,928
Factor Arrows
22,464
Factor Arrows
21,232
Factor Arrows
2616
Factor Arrows
2308
Factor Arrows
2154
Factor Arrows
277
Factor Arrows
711

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, 7, 11

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 7 x 11 = 78,848

This can also be written as 210 x 71 x 111 = 78,848

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


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