Q: What are the prime factors of the number 178,891,080?

 A: 2, 3, 5, 19, 31, 2531

Why are those the prime factors of the number 178,891,080?

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 178,891,080

178,891,080
Factor Arrows
289,445,540
Factor Arrows
244,722,770
Factor Arrows
222,361,385
Factor Arrows
37,453,795
Factor Arrows
51,490,759
Factor Arrows
1978,461
Factor Arrows
312,531

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, 5, 19, 31, 2531

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 19 x 31 x 2,531 = 178,891,080

This can also be written as 23 x 31 x 51 x 191 x 311 x 2,5311 = 178,891,080

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


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