A:
Positive:
1 x 8104765317 x 476750923 x 352381153 x 1529201391 x 207283901 x 899531219 x 664873911 x 20723
Negative:
-1 x -81047653-17 x -4767509-23 x -3523811-53 x -1529201-391 x -207283-901 x -89953-1219 x -66487-3911 x -20723
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 81,047,653, 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 | 81,047,653 | |
| -1 | -81,047,653 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 81,047,653.
Example:
1 x 81,047,653 = 81,047,653
and
-1 x -81,047,653 = 81,047,653
Notice both answers equal 81,047,653
With that explanation out of the way, let's continue. Next, we take the number 81,047,653 and divide it by 2:
81,047,653 ÷ 2 = 40,523,826.5
If the quotient is a whole number, then 2 and 40,523,826.5 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 | 81,047,653 | |
| -1 | -81,047,653 |
Now, we try dividing 81,047,653 by 3:
81,047,653 ÷ 3 = 27,015,884.3333
If the quotient is a whole number, then 3 and 27,015,884.3333 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 | 81,047,653 | |
| -1 | -81,047,653 |
Let's try dividing by 4:
81,047,653 ÷ 4 = 20,261,913.25
If the quotient is a whole number, then 4 and 20,261,913.25 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 | 81,047,653 | |
| -1 | 81,047,653 |
If you did it right, you will end up with this table:
| 1 | 17 | 23 | 53 | 391 | 901 | 1,219 | 3,911 | 20,723 | 66,487 | 89,953 | 207,283 | 1,529,201 | 3,523,811 | 4,767,509 | 81,047,653 |
| -1 | -17 | -23 | -53 | -391 | -901 | -1,219 | -3,911 | -20,723 | -66,487 | -89,953 | -207,283 | -1,529,201 | -3,523,811 | -4,767,509 | -81,047,653 |
Here are some more numbers to try:
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