A:
Positive:
1 x 209200755 x 418401511 x 190182525 x 83680355 x 380365127 x 164725275 x 76073599 x 34925635 x 329451397 x 149752995 x 69853175 x 6589
Negative:
-1 x -20920075-5 x -4184015-11 x -1901825-25 x -836803-55 x -380365-127 x -164725-275 x -76073-599 x -34925-635 x -32945-1397 x -14975-2995 x -6985-3175 x -6589
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 20,920,075, 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 | 20,920,075 | |
| -1 | -20,920,075 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,920,075.
Example:
1 x 20,920,075 = 20,920,075
and
-1 x -20,920,075 = 20,920,075
Notice both answers equal 20,920,075
With that explanation out of the way, let's continue. Next, we take the number 20,920,075 and divide it by 2:
20,920,075 ÷ 2 = 10,460,037.5
If the quotient is a whole number, then 2 and 10,460,037.5 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 | 20,920,075 | |
| -1 | -20,920,075 |
Now, we try dividing 20,920,075 by 3:
20,920,075 ÷ 3 = 6,973,358.3333
If the quotient is a whole number, then 3 and 6,973,358.3333 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 | 20,920,075 | |
| -1 | -20,920,075 |
Let's try dividing by 4:
20,920,075 ÷ 4 = 5,230,018.75
If the quotient is a whole number, then 4 and 5,230,018.75 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 | 20,920,075 | |
| -1 | 20,920,075 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 25 | 55 | 127 | 275 | 599 | 635 | 1,397 | 2,995 | 3,175 | 6,589 | 6,985 | 14,975 | 32,945 | 34,925 | 76,073 | 164,725 | 380,365 | 836,803 | 1,901,825 | 4,184,015 | 20,920,075 |
| -1 | -5 | -11 | -25 | -55 | -127 | -275 | -599 | -635 | -1,397 | -2,995 | -3,175 | -6,589 | -6,985 | -14,975 | -32,945 | -34,925 | -76,073 | -164,725 | -380,365 | -836,803 | -1,901,825 | -4,184,015 | -20,920,075 |
Here are some more numbers to try:
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