A:
Positive:
1 x 20562061311 x 1869278331 x 6632923131 x 1569623341 x 6029931441 x 1426934061 x 506334603 x 44671
Negative:
-1 x -205620613-11 x -18692783-31 x -6632923-131 x -1569623-341 x -602993-1441 x -142693-4061 x -50633-4603 x -44671
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 205,620,613, 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 | 205,620,613 | |
| -1 | -205,620,613 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 205,620,613.
Example:
1 x 205,620,613 = 205,620,613
and
-1 x -205,620,613 = 205,620,613
Notice both answers equal 205,620,613
With that explanation out of the way, let's continue. Next, we take the number 205,620,613 and divide it by 2:
205,620,613 ÷ 2 = 102,810,306.5
If the quotient is a whole number, then 2 and 102,810,306.5 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 | 205,620,613 | |
| -1 | -205,620,613 |
Now, we try dividing 205,620,613 by 3:
205,620,613 ÷ 3 = 68,540,204.3333
If the quotient is a whole number, then 3 and 68,540,204.3333 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 | 205,620,613 | |
| -1 | -205,620,613 |
Let's try dividing by 4:
205,620,613 ÷ 4 = 51,405,153.25
If the quotient is a whole number, then 4 and 51,405,153.25 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 | 205,620,613 | |
| -1 | 205,620,613 |
If you did it right, you will end up with this table:
| 1 | 11 | 31 | 131 | 341 | 1,441 | 4,061 | 4,603 | 44,671 | 50,633 | 142,693 | 602,993 | 1,569,623 | 6,632,923 | 18,692,783 | 205,620,613 |
| -1 | -11 | -31 | -131 | -341 | -1,441 | -4,061 | -4,603 | -44,671 | -50,633 | -142,693 | -602,993 | -1,569,623 | -6,632,923 | -18,692,783 | -205,620,613 |
Here are some more numbers to try:
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