Q: What are the prime factors of the number 1,836,160?

 A: 2, 5, 19, 151

Why are those the prime factors of the number 1,836,160?

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 1,836,160

1,836,160
Factor Arrows
2918,080
Factor Arrows
2459,040
Factor Arrows
2229,520
Factor Arrows
2114,760
Factor Arrows
257,380
Factor Arrows
228,690
Factor Arrows
214,345
Factor Arrows
52,869
Factor Arrows
19151

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, 19, 151

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 5 x 19 x 151 = 1,836,160

This can also be written as 27 x 51 x 191 x 1511 = 1,836,160

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


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