A:
Positive:
1 x 212601837 x 303716917 x 125059919 x 1118957119 x 178657133 x 159851323 x 658212261 x 9403
Negative:
-1 x -21260183-7 x -3037169-17 x -1250599-19 x -1118957-119 x -178657-133 x -159851-323 x -65821-2261 x -9403
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 21,260,183, 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 | 21,260,183 | |
| -1 | -21,260,183 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,260,183.
Example:
1 x 21,260,183 = 21,260,183
and
-1 x -21,260,183 = 21,260,183
Notice both answers equal 21,260,183
With that explanation out of the way, let's continue. Next, we take the number 21,260,183 and divide it by 2:
21,260,183 ÷ 2 = 10,630,091.5
If the quotient is a whole number, then 2 and 10,630,091.5 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 | 21,260,183 | |
| -1 | -21,260,183 |
Now, we try dividing 21,260,183 by 3:
21,260,183 ÷ 3 = 7,086,727.6667
If the quotient is a whole number, then 3 and 7,086,727.6667 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 | 21,260,183 | |
| -1 | -21,260,183 |
Let's try dividing by 4:
21,260,183 ÷ 4 = 5,315,045.75
If the quotient is a whole number, then 4 and 5,315,045.75 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 | 21,260,183 | |
| -1 | 21,260,183 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 19 | 119 | 133 | 323 | 2,261 | 9,403 | 65,821 | 159,851 | 178,657 | 1,118,957 | 1,250,599 | 3,037,169 | 21,260,183 |
| -1 | -7 | -17 | -19 | -119 | -133 | -323 | -2,261 | -9,403 | -65,821 | -159,851 | -178,657 | -1,118,957 | -1,250,599 | -3,037,169 | -21,260,183 |
Here are some more numbers to try:
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