Q: What are the prime factors of the number 1,660,176?

 A: 2, 3, 7, 61

Why are those the prime factors of the number 1,660,176?

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 1,660,176

1,660,176
Factor Arrows
2830,088
Factor Arrows
2415,044
Factor Arrows
2207,522
Factor Arrows
2103,761
Factor Arrows
334,587
Factor Arrows
311,529
Factor Arrows
33,843
Factor Arrows
31,281
Factor Arrows
3427
Factor Arrows
761

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, 61

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 7 x 61 = 1,660,176

This can also be written as 24 x 35 x 71 x 611 = 1,660,176

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


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