Q: What are the prime factors of the number 71,610,645?

 A: 3, 5, 61, 1283

Why are those the prime factors of the number 71,610,645?

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 71,610,645

71,610,645
Factor Arrows
323,870,215
Factor Arrows
54,774,043
Factor Arrows
6178,263
Factor Arrows
611,283

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:

3, 5, 61, 1283

We can check our work by multiplying all of the prime factors together: 3 x 5 x 61 x 61 x 1,283 = 71,610,645

This can also be written as 31 x 51 x 612 x 1,2831 = 71,610,645

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


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