Q: What are the prime factors of the number 12,306,432?

 A: 2, 3, 2003

Why are those the prime factors of the number 12,306,432?

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 12,306,432

12,306,432
Factor Arrows
26,153,216
Factor Arrows
23,076,608
Factor Arrows
21,538,304
Factor Arrows
2769,152
Factor Arrows
2384,576
Factor Arrows
2192,288
Factor Arrows
296,144
Factor Arrows
248,072
Factor Arrows
224,036
Factor Arrows
212,018
Factor Arrows
26,009
Factor Arrows
32,003

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, 2003

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 2,003 = 12,306,432

This can also be written as 211 x 31 x 2,0031 = 12,306,432

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


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