Q: What are the prime factors of the number 12,153,216?

 A: 2, 3, 31649

Why are those the prime factors of the number 12,153,216?

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 12,153,216

12,153,216
Factor Arrows
26,076,608
Factor Arrows
23,038,304
Factor Arrows
21,519,152
Factor Arrows
2759,576
Factor Arrows
2379,788
Factor Arrows
2189,894
Factor Arrows
294,947
Factor Arrows
331,649

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, 31649

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 31,649 = 12,153,216

This can also be written as 27 x 31 x 31,6491 = 12,153,216

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


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