Q: What are the prime factors of the number 620,505,402?

 A: 2, 3, 11, 29, 73, 4441

Why are those the prime factors of the number 620,505,402?

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 620,505,402

620,505,402
Factor Arrows
2310,252,701
Factor Arrows
3103,417,567
Factor Arrows
119,401,597
Factor Arrows
29324,193
Factor Arrows
734,441

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, 11, 29, 73, 4441

We can check our work by multiplying all of the prime factors together: 2 x 3 x 11 x 29 x 73 x 4,441 = 620,505,402

This can also be written as 21 x 31 x 111 x 291 x 731 x 4,4411 = 620,505,402

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


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