A:
Positive:
1 x 2214500477 x 3163572113 x 1703461991 x 2433517283 x 7825091981 x 1117873679 x 601938599 x 25753
Negative:
-1 x -221450047-7 x -31635721-13 x -17034619-91 x -2433517-283 x -782509-1981 x -111787-3679 x -60193-8599 x -25753
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 221,450,047, 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 | 221,450,047 | |
| -1 | -221,450,047 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,450,047.
Example:
1 x 221,450,047 = 221,450,047
and
-1 x -221,450,047 = 221,450,047
Notice both answers equal 221,450,047
With that explanation out of the way, let's continue. Next, we take the number 221,450,047 and divide it by 2:
221,450,047 ÷ 2 = 110,725,023.5
If the quotient is a whole number, then 2 and 110,725,023.5 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 | 221,450,047 | |
| -1 | -221,450,047 |
Now, we try dividing 221,450,047 by 3:
221,450,047 ÷ 3 = 73,816,682.3333
If the quotient is a whole number, then 3 and 73,816,682.3333 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 | 221,450,047 | |
| -1 | -221,450,047 |
Let's try dividing by 4:
221,450,047 ÷ 4 = 55,362,511.75
If the quotient is a whole number, then 4 and 55,362,511.75 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 | 221,450,047 | |
| -1 | 221,450,047 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 283 | 1,981 | 3,679 | 8,599 | 25,753 | 60,193 | 111,787 | 782,509 | 2,433,517 | 17,034,619 | 31,635,721 | 221,450,047 |
| -1 | -7 | -13 | -91 | -283 | -1,981 | -3,679 | -8,599 | -25,753 | -60,193 | -111,787 | -782,509 | -2,433,517 | -17,034,619 | -31,635,721 | -221,450,047 |
Here are some more numbers to try:
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