A:
Positive:
1 x 202072255 x 404144523 x 87857525 x 808289113 x 178825115 x 175715311 x 64975565 x 35765575 x 351431555 x 129952599 x 77752825 x 7153
Negative:
-1 x -20207225-5 x -4041445-23 x -878575-25 x -808289-113 x -178825-115 x -175715-311 x -64975-565 x -35765-575 x -35143-1555 x -12995-2599 x -7775-2825 x -7153
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 20,207,225, 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 | 20,207,225 | |
| -1 | -20,207,225 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,207,225.
Example:
1 x 20,207,225 = 20,207,225
and
-1 x -20,207,225 = 20,207,225
Notice both answers equal 20,207,225
With that explanation out of the way, let's continue. Next, we take the number 20,207,225 and divide it by 2:
20,207,225 ÷ 2 = 10,103,612.5
If the quotient is a whole number, then 2 and 10,103,612.5 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 | 20,207,225 | |
| -1 | -20,207,225 |
Now, we try dividing 20,207,225 by 3:
20,207,225 ÷ 3 = 6,735,741.6667
If the quotient is a whole number, then 3 and 6,735,741.6667 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 | 20,207,225 | |
| -1 | -20,207,225 |
Let's try dividing by 4:
20,207,225 ÷ 4 = 5,051,806.25
If the quotient is a whole number, then 4 and 5,051,806.25 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 | 20,207,225 | |
| -1 | 20,207,225 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 25 | 113 | 115 | 311 | 565 | 575 | 1,555 | 2,599 | 2,825 | 7,153 | 7,775 | 12,995 | 35,143 | 35,765 | 64,975 | 175,715 | 178,825 | 808,289 | 878,575 | 4,041,445 | 20,207,225 |
| -1 | -5 | -23 | -25 | -113 | -115 | -311 | -565 | -575 | -1,555 | -2,599 | -2,825 | -7,153 | -7,775 | -12,995 | -35,143 | -35,765 | -64,975 | -175,715 | -178,825 | -808,289 | -878,575 | -4,041,445 | -20,207,225 |
Here are some more numbers to try:
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