Q: What are the prime factors of the number 245,140,160?

 A: 2, 5, 79, 9697

Why are those the prime factors of the number 245,140,160?

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 245,140,160

245,140,160
Factor Arrows
2122,570,080
Factor Arrows
261,285,040
Factor Arrows
230,642,520
Factor Arrows
215,321,260
Factor Arrows
27,660,630
Factor Arrows
23,830,315
Factor Arrows
5766,063
Factor Arrows
799,697

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, 79, 9697

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 5 x 79 x 9,697 = 245,140,160

This can also be written as 26 x 51 x 791 x 9,6971 = 245,140,160

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


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