Q: What are the prime factors of the number 121,542,300?

 A: 2, 3, 5, 11, 12277

Why are those the prime factors of the number 121,542,300?

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 121,542,300

121,542,300
Factor Arrows
260,771,150
Factor Arrows
230,385,575
Factor Arrows
310,128,525
Factor Arrows
33,376,175
Factor Arrows
5675,235
Factor Arrows
5135,047
Factor Arrows
1112,277

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, 5, 11, 12277

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 5 x 11 x 12,277 = 121,542,300

This can also be written as 22 x 32 x 52 x 111 x 12,2771 = 121,542,300

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


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