Q: What are the prime factors of the number 82,578,780?

 A: 2, 3, 5, 149, 3079

Why are those the prime factors of the number 82,578,780?

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 82,578,780

82,578,780
Factor Arrows
241,289,390
Factor Arrows
220,644,695
Factor Arrows
36,881,565
Factor Arrows
32,293,855
Factor Arrows
5458,771
Factor Arrows
1493,079

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, 5, 149, 3079

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 149 x 3,079 = 82,578,780

This can also be written as 22 x 32 x 51 x 1491 x 3,0791 = 82,578,780

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


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