Q: What are the prime factors of the number 705,420,573?

 A: 3, 11, 13, 199, 8263

Why are those the prime factors of the number 705,420,573?

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 705,420,573

705,420,573
Factor Arrows
3235,140,191
Factor Arrows
1121,376,381
Factor Arrows
131,644,337
Factor Arrows
1998,263

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, 11, 13, 199, 8263

We can check our work by multiplying all of the prime factors together: 3 x 11 x 13 x 199 x 8,263 = 705,420,573

This can also be written as 31 x 111 x 131 x 1991 x 8,2631 = 705,420,573

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


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