A:
Positive:
1 x 211044555 x 422089123 x 91758579 x 267145101 x 208955115 x 183517395 x 53429505 x 41791529 x 398951817 x 116152323 x 90852645 x 7979
Negative:
-1 x -21104455-5 x -4220891-23 x -917585-79 x -267145-101 x -208955-115 x -183517-395 x -53429-505 x -41791-529 x -39895-1817 x -11615-2323 x -9085-2645 x -7979
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 21,104,455, 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 | 21,104,455 | |
| -1 | -21,104,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,104,455.
Example:
1 x 21,104,455 = 21,104,455
and
-1 x -21,104,455 = 21,104,455
Notice both answers equal 21,104,455
With that explanation out of the way, let's continue. Next, we take the number 21,104,455 and divide it by 2:
21,104,455 ÷ 2 = 10,552,227.5
If the quotient is a whole number, then 2 and 10,552,227.5 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 | 21,104,455 | |
| -1 | -21,104,455 |
Now, we try dividing 21,104,455 by 3:
21,104,455 ÷ 3 = 7,034,818.3333
If the quotient is a whole number, then 3 and 7,034,818.3333 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 | 21,104,455 | |
| -1 | -21,104,455 |
Let's try dividing by 4:
21,104,455 ÷ 4 = 5,276,113.75
If the quotient is a whole number, then 4 and 5,276,113.75 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 | 21,104,455 | |
| -1 | 21,104,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 79 | 101 | 115 | 395 | 505 | 529 | 1,817 | 2,323 | 2,645 | 7,979 | 9,085 | 11,615 | 39,895 | 41,791 | 53,429 | 183,517 | 208,955 | 267,145 | 917,585 | 4,220,891 | 21,104,455 |
| -1 | -5 | -23 | -79 | -101 | -115 | -395 | -505 | -529 | -1,817 | -2,323 | -2,645 | -7,979 | -9,085 | -11,615 | -39,895 | -41,791 | -53,429 | -183,517 | -208,955 | -267,145 | -917,585 | -4,220,891 | -21,104,455 |
Here are some more numbers to try:
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