Q: What are the prime factors of the number 313,102,020?

 A: 2, 3, 5, 7, 11, 61, 101

Why are those the prime factors of the number 313,102,020?

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 313,102,020

313,102,020
Factor Arrows
2156,551,010
Factor Arrows
278,275,505
Factor Arrows
326,091,835
Factor Arrows
55,218,367
Factor Arrows
7745,481
Factor Arrows
1167,771
Factor Arrows
116,161
Factor Arrows
61101

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, 7, 11, 61, 101

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 7 x 11 x 11 x 61 x 101 = 313,102,020

This can also be written as 22 x 31 x 51 x 71 x 112 x 611 x 1011 = 313,102,020

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


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