Q: What are the prime factors of the number 121,302,636?

 A: 2, 3, 7, 13, 2267

Why are those the prime factors of the number 121,302,636?

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 121,302,636

121,302,636
Factor Arrows
260,651,318
Factor Arrows
230,325,659
Factor Arrows
310,108,553
Factor Arrows
71,444,079
Factor Arrows
7206,297
Factor Arrows
729,471
Factor Arrows
132,267

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, 13, 2267

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 7 x 7 x 7 x 13 x 2,267 = 121,302,636

This can also be written as 22 x 31 x 73 x 131 x 2,2671 = 121,302,636

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


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