A:
Positive:
1 x 915384855 x 1830769719 x 481781579 x 115871595 x 963563395 x 2317431501 x 609857505 x 12197
Negative:
-1 x -91538485-5 x -18307697-19 x -4817815-79 x -1158715-95 x -963563-395 x -231743-1501 x -60985-7505 x -12197
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 91,538,485, 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 | 91,538,485 | |
| -1 | -91,538,485 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 91,538,485.
Example:
1 x 91,538,485 = 91,538,485
and
-1 x -91,538,485 = 91,538,485
Notice both answers equal 91,538,485
With that explanation out of the way, let's continue. Next, we take the number 91,538,485 and divide it by 2:
91,538,485 ÷ 2 = 45,769,242.5
If the quotient is a whole number, then 2 and 45,769,242.5 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 | 91,538,485 | |
| -1 | -91,538,485 |
Now, we try dividing 91,538,485 by 3:
91,538,485 ÷ 3 = 30,512,828.3333
If the quotient is a whole number, then 3 and 30,512,828.3333 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 | 91,538,485 | |
| -1 | -91,538,485 |
Let's try dividing by 4:
91,538,485 ÷ 4 = 22,884,621.25
If the quotient is a whole number, then 4 and 22,884,621.25 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 | 91,538,485 | |
| -1 | 91,538,485 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 79 | 95 | 395 | 1,501 | 7,505 | 12,197 | 60,985 | 231,743 | 963,563 | 1,158,715 | 4,817,815 | 18,307,697 | 91,538,485 |
| -1 | -5 | -19 | -79 | -95 | -395 | -1,501 | -7,505 | -12,197 | -60,985 | -231,743 | -963,563 | -1,158,715 | -4,817,815 | -18,307,697 | -91,538,485 |
Here are some more numbers to try:
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