A:
Positive:
1 x 1521250117 x 89485329 x 52456959 x 257839493 x 30857523 x 290871003 x 151671711 x 8891
Negative:
-1 x -15212501-17 x -894853-29 x -524569-59 x -257839-493 x -30857-523 x -29087-1003 x -15167-1711 x -8891
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 15,212,501, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 15,212,501 | |
| -1 | -15,212,501 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,212,501.
Example:
1 x 15,212,501 = 15,212,501
and
-1 x -15,212,501 = 15,212,501
Notice both answers equal 15,212,501
With that explanation out of the way, let's continue. Next, we take the number 15,212,501 and divide it by 2:
15,212,501 ÷ 2 = 7,606,250.5
If the quotient is a whole number, then 2 and 7,606,250.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,212,501 | |
| -1 | -15,212,501 |
Now, we try dividing 15,212,501 by 3:
15,212,501 ÷ 3 = 5,070,833.6667
If the quotient is a whole number, then 3 and 5,070,833.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,212,501 | |
| -1 | -15,212,501 |
Let's try dividing by 4:
15,212,501 ÷ 4 = 3,803,125.25
If the quotient is a whole number, then 4 and 3,803,125.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,212,501 | |
| -1 | 15,212,501 |
If you did it right, you will end up with this table:
| 1 | 17 | 29 | 59 | 493 | 523 | 1,003 | 1,711 | 8,891 | 15,167 | 29,087 | 30,857 | 257,839 | 524,569 | 894,853 | 15,212,501 |
| -1 | -17 | -29 | -59 | -493 | -523 | -1,003 | -1,711 | -8,891 | -15,167 | -29,087 | -30,857 | -257,839 | -524,569 | -894,853 | -15,212,501 |
Here are some more numbers to try:
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