Q: What are the prime factors of the number 642,710,336?

 A: 2, 43, 47, 4969

Why are those the prime factors of the number 642,710,336?

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 642,710,336

642,710,336
Factor Arrows
2321,355,168
Factor Arrows
2160,677,584
Factor Arrows
280,338,792
Factor Arrows
240,169,396
Factor Arrows
220,084,698
Factor Arrows
210,042,349
Factor Arrows
43233,543
Factor Arrows
474,969

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, 43, 47, 4969

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 43 x 47 x 4,969 = 642,710,336

This can also be written as 26 x 431 x 471 x 4,9691 = 642,710,336

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


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