A:
Positive:
1 x 22107651717 x 1300450137 x 5975041131 x 1687607629 x 3514732227 x 992712683 x 823994847 x 45611
Negative:
-1 x -221076517-17 x -13004501-37 x -5975041-131 x -1687607-629 x -351473-2227 x -99271-2683 x -82399-4847 x -45611
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 221,076,517, 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 | 221,076,517 | |
| -1 | -221,076,517 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,076,517.
Example:
1 x 221,076,517 = 221,076,517
and
-1 x -221,076,517 = 221,076,517
Notice both answers equal 221,076,517
With that explanation out of the way, let's continue. Next, we take the number 221,076,517 and divide it by 2:
221,076,517 ÷ 2 = 110,538,258.5
If the quotient is a whole number, then 2 and 110,538,258.5 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 | 221,076,517 | |
| -1 | -221,076,517 |
Now, we try dividing 221,076,517 by 3:
221,076,517 ÷ 3 = 73,692,172.3333
If the quotient is a whole number, then 3 and 73,692,172.3333 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 | 221,076,517 | |
| -1 | -221,076,517 |
Let's try dividing by 4:
221,076,517 ÷ 4 = 55,269,129.25
If the quotient is a whole number, then 4 and 55,269,129.25 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 | 221,076,517 | |
| -1 | 221,076,517 |
If you did it right, you will end up with this table:
| 1 | 17 | 37 | 131 | 629 | 2,227 | 2,683 | 4,847 | 45,611 | 82,399 | 99,271 | 351,473 | 1,687,607 | 5,975,041 | 13,004,501 | 221,076,517 |
| -1 | -17 | -37 | -131 | -629 | -2,227 | -2,683 | -4,847 | -45,611 | -82,399 | -99,271 | -351,473 | -1,687,607 | -5,975,041 | -13,004,501 | -221,076,517 |
Here are some more numbers to try:
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