Q: What are the prime factors of the number 820,485,246?

 A: 2, 3, 7, 17, 19, 31, 1951

Why are those the prime factors of the number 820,485,246?

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 820,485,246

820,485,246
Factor Arrows
2410,242,623
Factor Arrows
3136,747,541
Factor Arrows
719,535,363
Factor Arrows
171,149,139
Factor Arrows
1960,481
Factor Arrows
311,951

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, 7, 17, 19, 31, 1951

We can check our work by multiplying all of the prime factors together: 2 x 3 x 7 x 17 x 19 x 31 x 1,951 = 820,485,246

This can also be written as 21 x 31 x 71 x 171 x 191 x 311 x 1,9511 = 820,485,246

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


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