Q: What are the prime factors of the number 660,460,416?

 A: 2, 3, 7, 11, 3191

Why are those the prime factors of the number 660,460,416?

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 660,460,416

660,460,416
Factor Arrows
2330,230,208
Factor Arrows
2165,115,104
Factor Arrows
282,557,552
Factor Arrows
241,278,776
Factor Arrows
220,639,388
Factor Arrows
210,319,694
Factor Arrows
25,159,847
Factor Arrows
31,719,949
Factor Arrows
7245,707
Factor Arrows
735,101
Factor Arrows
113,191

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, 11, 3191

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 3 x 7 x 7 x 11 x 3,191 = 660,460,416

This can also be written as 27 x 31 x 72 x 111 x 3,1911 = 660,460,416

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


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