A:
Positive:
1 x 1611632477 x 2302332117 x 948019189 x 1810823119 x 1354313623 x 2586891513 x 10651910591 x 15217
Negative:
-1 x -161163247-7 x -23023321-17 x -9480191-89 x -1810823-119 x -1354313-623 x -258689-1513 x -106519-10591 x -15217
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 161,163,247, 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 | 161,163,247 | |
| -1 | -161,163,247 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,163,247.
Example:
1 x 161,163,247 = 161,163,247
and
-1 x -161,163,247 = 161,163,247
Notice both answers equal 161,163,247
With that explanation out of the way, let's continue. Next, we take the number 161,163,247 and divide it by 2:
161,163,247 ÷ 2 = 80,581,623.5
If the quotient is a whole number, then 2 and 80,581,623.5 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 | 161,163,247 | |
| -1 | -161,163,247 |
Now, we try dividing 161,163,247 by 3:
161,163,247 ÷ 3 = 53,721,082.3333
If the quotient is a whole number, then 3 and 53,721,082.3333 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 | 161,163,247 | |
| -1 | -161,163,247 |
Let's try dividing by 4:
161,163,247 ÷ 4 = 40,290,811.75
If the quotient is a whole number, then 4 and 40,290,811.75 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 | 161,163,247 | |
| -1 | 161,163,247 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 89 | 119 | 623 | 1,513 | 10,591 | 15,217 | 106,519 | 258,689 | 1,354,313 | 1,810,823 | 9,480,191 | 23,023,321 | 161,163,247 |
| -1 | -7 | -17 | -89 | -119 | -623 | -1,513 | -10,591 | -15,217 | -106,519 | -258,689 | -1,354,313 | -1,810,823 | -9,480,191 | -23,023,321 | -161,163,247 |
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