A:
Positive:
1 x 201030255 x 402060525 x 80412137 x 543325103 x 195175185 x 108665211 x 95275515 x 39035925 x 217331055 x 190552575 x 78073811 x 5275
Negative:
-1 x -20103025-5 x -4020605-25 x -804121-37 x -543325-103 x -195175-185 x -108665-211 x -95275-515 x -39035-925 x -21733-1055 x -19055-2575 x -7807-3811 x -5275
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 20,103,025, 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 | 20,103,025 | |
| -1 | -20,103,025 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,103,025.
Example:
1 x 20,103,025 = 20,103,025
and
-1 x -20,103,025 = 20,103,025
Notice both answers equal 20,103,025
With that explanation out of the way, let's continue. Next, we take the number 20,103,025 and divide it by 2:
20,103,025 ÷ 2 = 10,051,512.5
If the quotient is a whole number, then 2 and 10,051,512.5 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 | 20,103,025 | |
| -1 | -20,103,025 |
Now, we try dividing 20,103,025 by 3:
20,103,025 ÷ 3 = 6,701,008.3333
If the quotient is a whole number, then 3 and 6,701,008.3333 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 | 20,103,025 | |
| -1 | -20,103,025 |
Let's try dividing by 4:
20,103,025 ÷ 4 = 5,025,756.25
If the quotient is a whole number, then 4 and 5,025,756.25 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 | 20,103,025 | |
| -1 | 20,103,025 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 37 | 103 | 185 | 211 | 515 | 925 | 1,055 | 2,575 | 3,811 | 5,275 | 7,807 | 19,055 | 21,733 | 39,035 | 95,275 | 108,665 | 195,175 | 543,325 | 804,121 | 4,020,605 | 20,103,025 |
| -1 | -5 | -25 | -37 | -103 | -185 | -211 | -515 | -925 | -1,055 | -2,575 | -3,811 | -5,275 | -7,807 | -19,055 | -21,733 | -39,035 | -95,275 | -108,665 | -195,175 | -543,325 | -804,121 | -4,020,605 | -20,103,025 |
Here are some more numbers to try:
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