Q: What are the prime factors of the number 156,370,500?

 A: 2, 3, 5, 11, 13

Why are those the prime factors of the number 156,370,500?

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 156,370,500

156,370,500
Factor Arrows
278,185,250
Factor Arrows
239,092,625
Factor Arrows
313,030,875
Factor Arrows
34,343,625
Factor Arrows
31,447,875
Factor Arrows
3482,625
Factor Arrows
3160,875
Factor Arrows
353,625
Factor Arrows
317,875
Factor Arrows
53,575
Factor Arrows
5715
Factor Arrows
5143
Factor Arrows
1113

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, 11, 13

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 3 x 3 x 3 x 5 x 5 x 5 x 11 x 13 = 156,370,500

This can also be written as 22 x 37 x 53 x 111 x 131 = 156,370,500

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


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