Q: What are the prime factors of the number 11,778,048?

 A: 2, 3, 71

Why are those the prime factors of the number 11,778,048?

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 11,778,048

11,778,048
Factor Arrows
25,889,024
Factor Arrows
22,944,512
Factor Arrows
21,472,256
Factor Arrows
2736,128
Factor Arrows
2368,064
Factor Arrows
2184,032
Factor Arrows
292,016
Factor Arrows
246,008
Factor Arrows
223,004
Factor Arrows
211,502
Factor Arrows
25,751
Factor Arrows
31,917
Factor Arrows
3639
Factor Arrows
3213
Factor Arrows
371

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, 71

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 2 x 3 x 3 x 3 x 3 x 71 = 11,778,048

This can also be written as 211 x 34 x 711 = 11,778,048

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


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