Q: What are the prime factors of the number 321,020,112?

 A: 2, 3, 7, 17, 43, 1307

Why are those the prime factors of the number 321,020,112?

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 321,020,112

321,020,112
Factor Arrows
2160,510,056
Factor Arrows
280,255,028
Factor Arrows
240,127,514
Factor Arrows
220,063,757
Factor Arrows
36,687,919
Factor Arrows
7955,417
Factor Arrows
1756,201
Factor Arrows
431,307

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, 17, 43, 1307

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 7 x 17 x 43 x 1,307 = 321,020,112

This can also be written as 24 x 31 x 71 x 171 x 431 x 1,3071 = 321,020,112

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


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