Q: What are the prime factors of the number 332,221,120?

 A: 2, 5, 7, 11, 97, 139

Why are those the prime factors of the number 332,221,120?

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 332,221,120

332,221,120
Factor Arrows
2166,110,560
Factor Arrows
283,055,280
Factor Arrows
241,527,640
Factor Arrows
220,763,820
Factor Arrows
210,381,910
Factor Arrows
25,190,955
Factor Arrows
51,038,191
Factor Arrows
7148,313
Factor Arrows
1113,483
Factor Arrows
97139

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, 7, 11, 97, 139

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 7 x 11 x 97 x 139 = 332,221,120

This can also be written as 26 x 51 x 71 x 111 x 971 x 1391 = 332,221,120

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


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