Q: What are the prime factors of the number 1,247,232?

 A: 2, 3, 7, 29

Why are those the prime factors of the number 1,247,232?

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 1,247,232

1,247,232
Factor Arrows
2623,616
Factor Arrows
2311,808
Factor Arrows
2155,904
Factor Arrows
277,952
Factor Arrows
238,976
Factor Arrows
219,488
Factor Arrows
29,744
Factor Arrows
24,872
Factor Arrows
22,436
Factor Arrows
21,218
Factor Arrows
2609
Factor Arrows
3203
Factor Arrows
729

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, 29

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 7 x 29 = 1,247,232

This can also be written as 211 x 31 x 71 x 291 = 1,247,232

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


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