Q: What are the prime factors of the number 787,740,456?

 A: 2, 3, 19, 29, 71, 839

Why are those the prime factors of the number 787,740,456?

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 787,740,456

787,740,456
Factor Arrows
2393,870,228
Factor Arrows
2196,935,114
Factor Arrows
298,467,557
Factor Arrows
332,822,519
Factor Arrows
191,727,501
Factor Arrows
2959,569
Factor Arrows
71839

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, 19, 29, 71, 839

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 19 x 29 x 71 x 839 = 787,740,456

This can also be written as 23 x 31 x 191 x 291 x 711 x 8391 = 787,740,456

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


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