A:
Positive:
1 x 22180507713 x 1706192923 x 9643699299 x 741823389 x 5701931907 x 1163115057 x 438618947 x 24791
Negative:
-1 x -221805077-13 x -17061929-23 x -9643699-299 x -741823-389 x -570193-1907 x -116311-5057 x -43861-8947 x -24791
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 221,805,077, 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 | 221,805,077 | |
| -1 | -221,805,077 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,805,077.
Example:
1 x 221,805,077 = 221,805,077
and
-1 x -221,805,077 = 221,805,077
Notice both answers equal 221,805,077
With that explanation out of the way, let's continue. Next, we take the number 221,805,077 and divide it by 2:
221,805,077 ÷ 2 = 110,902,538.5
If the quotient is a whole number, then 2 and 110,902,538.5 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 | 221,805,077 | |
| -1 | -221,805,077 |
Now, we try dividing 221,805,077 by 3:
221,805,077 ÷ 3 = 73,935,025.6667
If the quotient is a whole number, then 3 and 73,935,025.6667 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 | 221,805,077 | |
| -1 | -221,805,077 |
Let's try dividing by 4:
221,805,077 ÷ 4 = 55,451,269.25
If the quotient is a whole number, then 4 and 55,451,269.25 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 | 221,805,077 | |
| -1 | 221,805,077 |
If you did it right, you will end up with this table:
| 1 | 13 | 23 | 299 | 389 | 1,907 | 5,057 | 8,947 | 24,791 | 43,861 | 116,311 | 570,193 | 741,823 | 9,643,699 | 17,061,929 | 221,805,077 |
| -1 | -13 | -23 | -299 | -389 | -1,907 | -5,057 | -8,947 | -24,791 | -43,861 | -116,311 | -570,193 | -741,823 | -9,643,699 | -17,061,929 | -221,805,077 |
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