Q: What are the prime factors of the number 121,011,030?

 A: 2, 3, 5, 7, 43, 1489

Why are those the prime factors of the number 121,011,030?

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 121,011,030

121,011,030
Factor Arrows
260,505,515
Factor Arrows
320,168,505
Factor Arrows
36,722,835
Factor Arrows
32,240,945
Factor Arrows
5448,189
Factor Arrows
764,027
Factor Arrows
431,489

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, 7, 43, 1489

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 7 x 43 x 1,489 = 121,011,030

This can also be written as 21 x 33 x 51 x 71 x 431 x 1,4891 = 121,011,030

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


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