Q: What are the prime factors of the number 12,450,560?

 A: 2, 5, 71, 137

Why are those the prime factors of the number 12,450,560?

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 12,450,560

12,450,560
Factor Arrows
26,225,280
Factor Arrows
23,112,640
Factor Arrows
21,556,320
Factor Arrows
2778,160
Factor Arrows
2389,080
Factor Arrows
2194,540
Factor Arrows
297,270
Factor Arrows
248,635
Factor Arrows
59,727
Factor Arrows
71137

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, 5, 71, 137

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 5 x 71 x 137 = 12,450,560

This can also be written as 28 x 51 x 711 x 1371 = 12,450,560

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


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