Q: What are the prime factors of the number 774,240,220?

 A: 2, 5, 13, 163, 18269

Why are those the prime factors of the number 774,240,220?

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 774,240,220

774,240,220
Factor Arrows
2387,120,110
Factor Arrows
2193,560,055
Factor Arrows
538,712,011
Factor Arrows
132,977,847
Factor Arrows
16318,269

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, 5, 13, 163, 18269

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 13 x 163 x 18,269 = 774,240,220

This can also be written as 22 x 51 x 131 x 1631 x 18,2691 = 774,240,220

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


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