A:
Positive:
1 x 616212555 x 1232425123 x 267918571 x 867905115 x 535837355 x 1735811633 x 377357547 x 8165
Negative:
-1 x -61621255-5 x -12324251-23 x -2679185-71 x -867905-115 x -535837-355 x -173581-1633 x -37735-7547 x -8165
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 61,621,255, 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 | 61,621,255 | |
| -1 | -61,621,255 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 61,621,255.
Example:
1 x 61,621,255 = 61,621,255
and
-1 x -61,621,255 = 61,621,255
Notice both answers equal 61,621,255
With that explanation out of the way, let's continue. Next, we take the number 61,621,255 and divide it by 2:
61,621,255 ÷ 2 = 30,810,627.5
If the quotient is a whole number, then 2 and 30,810,627.5 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 | 61,621,255 | |
| -1 | -61,621,255 |
Now, we try dividing 61,621,255 by 3:
61,621,255 ÷ 3 = 20,540,418.3333
If the quotient is a whole number, then 3 and 20,540,418.3333 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 | 61,621,255 | |
| -1 | -61,621,255 |
Let's try dividing by 4:
61,621,255 ÷ 4 = 15,405,313.75
If the quotient is a whole number, then 4 and 15,405,313.75 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 | 61,621,255 | |
| -1 | 61,621,255 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 71 | 115 | 355 | 1,633 | 7,547 | 8,165 | 37,735 | 173,581 | 535,837 | 867,905 | 2,679,185 | 12,324,251 | 61,621,255 |
| -1 | -5 | -23 | -71 | -115 | -355 | -1,633 | -7,547 | -8,165 | -37,735 | -173,581 | -535,837 | -867,905 | -2,679,185 | -12,324,251 | -61,621,255 |
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