A:
Positive:
1 x 211104537 x 301577913 x 162388161 x 34607391 x 231983427 x 49439793 x 266213803 x 5551
Negative:
-1 x -21110453-7 x -3015779-13 x -1623881-61 x -346073-91 x -231983-427 x -49439-793 x -26621-3803 x -5551
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 21,110,453, 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 | 21,110,453 | |
| -1 | -21,110,453 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,110,453.
Example:
1 x 21,110,453 = 21,110,453
and
-1 x -21,110,453 = 21,110,453
Notice both answers equal 21,110,453
With that explanation out of the way, let's continue. Next, we take the number 21,110,453 and divide it by 2:
21,110,453 ÷ 2 = 10,555,226.5
If the quotient is a whole number, then 2 and 10,555,226.5 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 | 21,110,453 | |
| -1 | -21,110,453 |
Now, we try dividing 21,110,453 by 3:
21,110,453 ÷ 3 = 7,036,817.6667
If the quotient is a whole number, then 3 and 7,036,817.6667 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 | 21,110,453 | |
| -1 | -21,110,453 |
Let's try dividing by 4:
21,110,453 ÷ 4 = 5,277,613.25
If the quotient is a whole number, then 4 and 5,277,613.25 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 | 21,110,453 | |
| -1 | 21,110,453 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 61 | 91 | 427 | 793 | 3,803 | 5,551 | 26,621 | 49,439 | 231,983 | 346,073 | 1,623,881 | 3,015,779 | 21,110,453 |
| -1 | -7 | -13 | -61 | -91 | -427 | -793 | -3,803 | -5,551 | -26,621 | -49,439 | -231,983 | -346,073 | -1,623,881 | -3,015,779 | -21,110,453 |
Here are some more numbers to try:
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