A:
Positive:
1 x 1611657537 x 2302367949 x 328909767 x 2405459343 x 469871469 x 3436373283 x 490917013 x 22981
Negative:
-1 x -161165753-7 x -23023679-49 x -3289097-67 x -2405459-343 x -469871-469 x -343637-3283 x -49091-7013 x -22981
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 161,165,753, 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 | 161,165,753 | |
| -1 | -161,165,753 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,165,753.
Example:
1 x 161,165,753 = 161,165,753
and
-1 x -161,165,753 = 161,165,753
Notice both answers equal 161,165,753
With that explanation out of the way, let's continue. Next, we take the number 161,165,753 and divide it by 2:
161,165,753 ÷ 2 = 80,582,876.5
If the quotient is a whole number, then 2 and 80,582,876.5 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 | 161,165,753 | |
| -1 | -161,165,753 |
Now, we try dividing 161,165,753 by 3:
161,165,753 ÷ 3 = 53,721,917.6667
If the quotient is a whole number, then 3 and 53,721,917.6667 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 | 161,165,753 | |
| -1 | -161,165,753 |
Let's try dividing by 4:
161,165,753 ÷ 4 = 40,291,438.25
If the quotient is a whole number, then 4 and 40,291,438.25 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 | 161,165,753 | |
| -1 | 161,165,753 |
If you did it right, you will end up with this table:
| 1 | 7 | 49 | 67 | 343 | 469 | 3,283 | 7,013 | 22,981 | 49,091 | 343,637 | 469,871 | 2,405,459 | 3,289,097 | 23,023,679 | 161,165,753 |
| -1 | -7 | -49 | -67 | -343 | -469 | -3,283 | -7,013 | -22,981 | -49,091 | -343,637 | -469,871 | -2,405,459 | -3,289,097 | -23,023,679 | -161,165,753 |
Here are some more numbers to try:
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