Q: What are the prime factors of the number 778,544?

 A: 2, 13, 19, 197

Why are those the prime factors of the number 778,544?

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 778,544

778,544
Factor Arrows
2389,272
Factor Arrows
2194,636
Factor Arrows
297,318
Factor Arrows
248,659
Factor Arrows
133,743
Factor Arrows
19197

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, 13, 19, 197

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 13 x 19 x 197 = 778,544

This can also be written as 24 x 131 x 191 x 1971 = 778,544

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


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