Q: What are the prime factors of the number 342,220,032?

 A: 2, 3, 7, 11, 643

Why are those the prime factors of the number 342,220,032?

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 342,220,032

342,220,032
Factor Arrows
2171,110,016
Factor Arrows
285,555,008
Factor Arrows
242,777,504
Factor Arrows
221,388,752
Factor Arrows
210,694,376
Factor Arrows
25,347,188
Factor Arrows
22,673,594
Factor Arrows
21,336,797
Factor Arrows
3445,599
Factor Arrows
3148,533
Factor Arrows
349,511
Factor Arrows
77,073
Factor Arrows
11643

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, 643

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 2 x 3 x 3 x 3 x 7 x 11 x 643 = 342,220,032

This can also be written as 28 x 33 x 71 x 111 x 6431 = 342,220,032

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


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