A:
Positive:
1 x 218032755 x 436065513 x 167717525 x 87213165 x 33543573 x 298675325 x 67087365 x 59735919 x 23725949 x 229751825 x 119474595 x 4745
Negative:
-1 x -21803275-5 x -4360655-13 x -1677175-25 x -872131-65 x -335435-73 x -298675-325 x -67087-365 x -59735-919 x -23725-949 x -22975-1825 x -11947-4595 x -4745
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 21,803,275, 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 | 21,803,275 | |
| -1 | -21,803,275 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,803,275.
Example:
1 x 21,803,275 = 21,803,275
and
-1 x -21,803,275 = 21,803,275
Notice both answers equal 21,803,275
With that explanation out of the way, let's continue. Next, we take the number 21,803,275 and divide it by 2:
21,803,275 ÷ 2 = 10,901,637.5
If the quotient is a whole number, then 2 and 10,901,637.5 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 | 21,803,275 | |
| -1 | -21,803,275 |
Now, we try dividing 21,803,275 by 3:
21,803,275 ÷ 3 = 7,267,758.3333
If the quotient is a whole number, then 3 and 7,267,758.3333 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 | 21,803,275 | |
| -1 | -21,803,275 |
Let's try dividing by 4:
21,803,275 ÷ 4 = 5,450,818.75
If the quotient is a whole number, then 4 and 5,450,818.75 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 | 21,803,275 | |
| -1 | 21,803,275 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 65 | 73 | 325 | 365 | 919 | 949 | 1,825 | 4,595 | 4,745 | 11,947 | 22,975 | 23,725 | 59,735 | 67,087 | 298,675 | 335,435 | 872,131 | 1,677,175 | 4,360,655 | 21,803,275 |
| -1 | -5 | -13 | -25 | -65 | -73 | -325 | -365 | -919 | -949 | -1,825 | -4,595 | -4,745 | -11,947 | -22,975 | -23,725 | -59,735 | -67,087 | -298,675 | -335,435 | -872,131 | -1,677,175 | -4,360,655 | -21,803,275 |
Here are some more numbers to try:
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