Q: What are the prime factors of the number 664,365,140?

 A: 2, 5, 107, 283, 1097

Why are those the prime factors of the number 664,365,140?

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 664,365,140

664,365,140
Factor Arrows
2332,182,570
Factor Arrows
2166,091,285
Factor Arrows
533,218,257
Factor Arrows
107310,451
Factor Arrows
2831,097

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, 5, 107, 283, 1097

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 107 x 283 x 1,097 = 664,365,140

This can also be written as 22 x 51 x 1071 x 2831 x 1,0971 = 664,365,140

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


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