A:
Positive:
1 x 901775155 x 1803550319 x 474618595 x 949237179 x 503785895 x 1007573401 x 265155303 x 17005
Negative:
-1 x -90177515-5 x -18035503-19 x -4746185-95 x -949237-179 x -503785-895 x -100757-3401 x -26515-5303 x -17005
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 90,177,515, 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 | 90,177,515 | |
| -1 | -90,177,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 90,177,515.
Example:
1 x 90,177,515 = 90,177,515
and
-1 x -90,177,515 = 90,177,515
Notice both answers equal 90,177,515
With that explanation out of the way, let's continue. Next, we take the number 90,177,515 and divide it by 2:
90,177,515 ÷ 2 = 45,088,757.5
If the quotient is a whole number, then 2 and 45,088,757.5 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 | 90,177,515 | |
| -1 | -90,177,515 |
Now, we try dividing 90,177,515 by 3:
90,177,515 ÷ 3 = 30,059,171.6667
If the quotient is a whole number, then 3 and 30,059,171.6667 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 | 90,177,515 | |
| -1 | -90,177,515 |
Let's try dividing by 4:
90,177,515 ÷ 4 = 22,544,378.75
If the quotient is a whole number, then 4 and 22,544,378.75 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 | 90,177,515 | |
| -1 | 90,177,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 179 | 895 | 3,401 | 5,303 | 17,005 | 26,515 | 100,757 | 503,785 | 949,237 | 4,746,185 | 18,035,503 | 90,177,515 |
| -1 | -5 | -19 | -95 | -179 | -895 | -3,401 | -5,303 | -17,005 | -26,515 | -100,757 | -503,785 | -949,237 | -4,746,185 | -18,035,503 | -90,177,515 |
Here are some more numbers to try:
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