Q: What are the prime factors of the number 653,221,440?

 A: 2, 3, 5, 226813

Why are those the prime factors of the number 653,221,440?

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 653,221,440

653,221,440
Factor Arrows
2326,610,720
Factor Arrows
2163,305,360
Factor Arrows
281,652,680
Factor Arrows
240,826,340
Factor Arrows
220,413,170
Factor Arrows
210,206,585
Factor Arrows
33,402,195
Factor Arrows
31,134,065
Factor Arrows
5226,813

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, 226813

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 3 x 3 x 5 x 226,813 = 653,221,440

This can also be written as 26 x 32 x 51 x 226,8131 = 653,221,440

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


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