Q: What are the prime factors of the number 767,784,780?

 A: 2, 3, 5, 7, 37, 43, 383

Why are those the prime factors of the number 767,784,780?

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 767,784,780

767,784,780
Factor Arrows
2383,892,390
Factor Arrows
2191,946,195
Factor Arrows
363,982,065
Factor Arrows
321,327,355
Factor Arrows
54,265,471
Factor Arrows
7609,353
Factor Arrows
3716,469
Factor Arrows
43383

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, 7, 37, 43, 383

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 7 x 37 x 43 x 383 = 767,784,780

This can also be written as 22 x 32 x 51 x 71 x 371 x 431 x 3831 = 767,784,780

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


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