Q: What are the prime factors of the number 121,544,448?

 A: 2, 3, 158261

Why are those the prime factors of the number 121,544,448?

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 121,544,448

121,544,448
Factor Arrows
260,772,224
Factor Arrows
230,386,112
Factor Arrows
215,193,056
Factor Arrows
27,596,528
Factor Arrows
23,798,264
Factor Arrows
21,899,132
Factor Arrows
2949,566
Factor Arrows
2474,783
Factor Arrows
3158,261

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, 158261

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 2 x 2 x 3 x 158,261 = 121,544,448

This can also be written as 28 x 31 x 158,2611 = 121,544,448

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


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