A:
Positive:
1 x 811821555 x 1623643119 x 427274561 x 133085595 x 854549305 x 2661711159 x 700455795 x 14009
Negative:
-1 x -81182155-5 x -16236431-19 x -4272745-61 x -1330855-95 x -854549-305 x -266171-1159 x -70045-5795 x -14009
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 81,182,155, 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 | 81,182,155 | |
| -1 | -81,182,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 81,182,155.
Example:
1 x 81,182,155 = 81,182,155
and
-1 x -81,182,155 = 81,182,155
Notice both answers equal 81,182,155
With that explanation out of the way, let's continue. Next, we take the number 81,182,155 and divide it by 2:
81,182,155 ÷ 2 = 40,591,077.5
If the quotient is a whole number, then 2 and 40,591,077.5 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 | 81,182,155 | |
| -1 | -81,182,155 |
Now, we try dividing 81,182,155 by 3:
81,182,155 ÷ 3 = 27,060,718.3333
If the quotient is a whole number, then 3 and 27,060,718.3333 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 | 81,182,155 | |
| -1 | -81,182,155 |
Let's try dividing by 4:
81,182,155 ÷ 4 = 20,295,538.75
If the quotient is a whole number, then 4 and 20,295,538.75 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 | 81,182,155 | |
| -1 | 81,182,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 61 | 95 | 305 | 1,159 | 5,795 | 14,009 | 70,045 | 266,171 | 854,549 | 1,330,855 | 4,272,745 | 16,236,431 | 81,182,155 |
| -1 | -5 | -19 | -61 | -95 | -305 | -1,159 | -5,795 | -14,009 | -70,045 | -266,171 | -854,549 | -1,330,855 | -4,272,745 | -16,236,431 | -81,182,155 |
Here are some more numbers to try:
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