Q: What are the prime factors of the number 163,303,360?

 A: 2, 5, 11, 17, 2729

Why are those the prime factors of the number 163,303,360?

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 163,303,360

163,303,360
Factor Arrows
281,651,680
Factor Arrows
240,825,840
Factor Arrows
220,412,920
Factor Arrows
210,206,460
Factor Arrows
25,103,230
Factor Arrows
22,551,615
Factor Arrows
5510,323
Factor Arrows
1146,393
Factor Arrows
172,729

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, 11, 17, 2729

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 11 x 17 x 2,729 = 163,303,360

This can also be written as 26 x 51 x 111 x 171 x 2,7291 = 163,303,360

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


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