Q: What are the prime factors of the number 5,056,128?

 A: 2, 3, 7, 11, 19

Why are those the prime factors of the number 5,056,128?

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 5,056,128

5,056,128
Factor Arrows
22,528,064
Factor Arrows
21,264,032
Factor Arrows
2632,016
Factor Arrows
2316,008
Factor Arrows
2158,004
Factor Arrows
279,002
Factor Arrows
239,501
Factor Arrows
313,167
Factor Arrows
34,389
Factor Arrows
31,463
Factor Arrows
7209
Factor Arrows
1119

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, 11, 19

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 3 x 3 x 3 x 7 x 11 x 19 = 5,056,128

This can also be written as 27 x 33 x 71 x 111 x 191 = 5,056,128

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


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