A:
Positive:
1 x 17264419711 x 1569492717 x 1015554173 x 2364989187 x 923231803 x 2149991241 x 13911712647 x 13651
Negative:
-1 x -172644197-11 x -15694927-17 x -10155541-73 x -2364989-187 x -923231-803 x -214999-1241 x -139117-12647 x -13651
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 172,644,197, 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 | 172,644,197 | |
| -1 | -172,644,197 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 172,644,197.
Example:
1 x 172,644,197 = 172,644,197
and
-1 x -172,644,197 = 172,644,197
Notice both answers equal 172,644,197
With that explanation out of the way, let's continue. Next, we take the number 172,644,197 and divide it by 2:
172,644,197 ÷ 2 = 86,322,098.5
If the quotient is a whole number, then 2 and 86,322,098.5 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 | 172,644,197 | |
| -1 | -172,644,197 |
Now, we try dividing 172,644,197 by 3:
172,644,197 ÷ 3 = 57,548,065.6667
If the quotient is a whole number, then 3 and 57,548,065.6667 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 | 172,644,197 | |
| -1 | -172,644,197 |
Let's try dividing by 4:
172,644,197 ÷ 4 = 43,161,049.25
If the quotient is a whole number, then 4 and 43,161,049.25 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 | 172,644,197 | |
| -1 | 172,644,197 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 73 | 187 | 803 | 1,241 | 12,647 | 13,651 | 139,117 | 214,999 | 923,231 | 2,364,989 | 10,155,541 | 15,694,927 | 172,644,197 |
| -1 | -11 | -17 | -73 | -187 | -803 | -1,241 | -12,647 | -13,651 | -139,117 | -214,999 | -923,231 | -2,364,989 | -10,155,541 | -15,694,927 | -172,644,197 |
Here are some more numbers to try:
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