Q: What are the prime factors of the number 221,410,260?

 A: 2, 3, 5, 97, 1409

Why are those the prime factors of the number 221,410,260?

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 221,410,260

221,410,260
Factor Arrows
2110,705,130
Factor Arrows
255,352,565
Factor Arrows
318,450,855
Factor Arrows
36,150,285
Factor Arrows
32,050,095
Factor Arrows
3683,365
Factor Arrows
5136,673
Factor Arrows
971,409

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, 97, 1409

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 5 x 97 x 1,409 = 221,410,260

This can also be written as 22 x 34 x 51 x 971 x 1,4091 = 221,410,260

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


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