A:
Positive:
1 x 2165065637 x 3092950913 x 1665435191 x 2379193479 x 4519973353 x 645714967 x 435896227 x 34769
Negative:
-1 x -216506563-7 x -30929509-13 x -16654351-91 x -2379193-479 x -451997-3353 x -64571-4967 x -43589-6227 x -34769
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 216,506,563, 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 | 216,506,563 | |
| -1 | -216,506,563 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 216,506,563.
Example:
1 x 216,506,563 = 216,506,563
and
-1 x -216,506,563 = 216,506,563
Notice both answers equal 216,506,563
With that explanation out of the way, let's continue. Next, we take the number 216,506,563 and divide it by 2:
216,506,563 ÷ 2 = 108,253,281.5
If the quotient is a whole number, then 2 and 108,253,281.5 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 | 216,506,563 | |
| -1 | -216,506,563 |
Now, we try dividing 216,506,563 by 3:
216,506,563 ÷ 3 = 72,168,854.3333
If the quotient is a whole number, then 3 and 72,168,854.3333 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 | 216,506,563 | |
| -1 | -216,506,563 |
Let's try dividing by 4:
216,506,563 ÷ 4 = 54,126,640.75
If the quotient is a whole number, then 4 and 54,126,640.75 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 | 216,506,563 | |
| -1 | 216,506,563 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 479 | 3,353 | 4,967 | 6,227 | 34,769 | 43,589 | 64,571 | 451,997 | 2,379,193 | 16,654,351 | 30,929,509 | 216,506,563 |
| -1 | -7 | -13 | -91 | -479 | -3,353 | -4,967 | -6,227 | -34,769 | -43,589 | -64,571 | -451,997 | -2,379,193 | -16,654,351 | -30,929,509 | -216,506,563 |
Here are some more numbers to try:
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