A:
Positive:
1 x 856128777 x 1223041123 x 3722299161 x 531757283 x 3025191879 x 455631981 x 432176509 x 13153
Negative:
-1 x -85612877-7 x -12230411-23 x -3722299-161 x -531757-283 x -302519-1879 x -45563-1981 x -43217-6509 x -13153
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 85,612,877, 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 | 85,612,877 | |
| -1 | -85,612,877 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 85,612,877.
Example:
1 x 85,612,877 = 85,612,877
and
-1 x -85,612,877 = 85,612,877
Notice both answers equal 85,612,877
With that explanation out of the way, let's continue. Next, we take the number 85,612,877 and divide it by 2:
85,612,877 ÷ 2 = 42,806,438.5
If the quotient is a whole number, then 2 and 42,806,438.5 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 | 85,612,877 | |
| -1 | -85,612,877 |
Now, we try dividing 85,612,877 by 3:
85,612,877 ÷ 3 = 28,537,625.6667
If the quotient is a whole number, then 3 and 28,537,625.6667 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 | 85,612,877 | |
| -1 | -85,612,877 |
Let's try dividing by 4:
85,612,877 ÷ 4 = 21,403,219.25
If the quotient is a whole number, then 4 and 21,403,219.25 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 | 85,612,877 | |
| -1 | 85,612,877 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 161 | 283 | 1,879 | 1,981 | 6,509 | 13,153 | 43,217 | 45,563 | 302,519 | 531,757 | 3,722,299 | 12,230,411 | 85,612,877 |
| -1 | -7 | -23 | -161 | -283 | -1,879 | -1,981 | -6,509 | -13,153 | -43,217 | -45,563 | -302,519 | -531,757 | -3,722,299 | -12,230,411 | -85,612,877 |
Here are some more numbers to try:
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