A:
Positive:
1 x 1977051713 x 152080973 x 27082983 x 238199251 x 78767949 x 208331079 x 183233263 x 6059
Negative:
-1 x -19770517-13 x -1520809-73 x -270829-83 x -238199-251 x -78767-949 x -20833-1079 x -18323-3263 x -6059
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 19,770,517, 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 | 19,770,517 | |
| -1 | -19,770,517 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,770,517.
Example:
1 x 19,770,517 = 19,770,517
and
-1 x -19,770,517 = 19,770,517
Notice both answers equal 19,770,517
With that explanation out of the way, let's continue. Next, we take the number 19,770,517 and divide it by 2:
19,770,517 ÷ 2 = 9,885,258.5
If the quotient is a whole number, then 2 and 9,885,258.5 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 | 19,770,517 | |
| -1 | -19,770,517 |
Now, we try dividing 19,770,517 by 3:
19,770,517 ÷ 3 = 6,590,172.3333
If the quotient is a whole number, then 3 and 6,590,172.3333 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 | 19,770,517 | |
| -1 | -19,770,517 |
Let's try dividing by 4:
19,770,517 ÷ 4 = 4,942,629.25
If the quotient is a whole number, then 4 and 4,942,629.25 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 | 19,770,517 | |
| -1 | 19,770,517 |
If you did it right, you will end up with this table:
| 1 | 13 | 73 | 83 | 251 | 949 | 1,079 | 3,263 | 6,059 | 18,323 | 20,833 | 78,767 | 238,199 | 270,829 | 1,520,809 | 19,770,517 |
| -1 | -13 | -73 | -83 | -251 | -949 | -1,079 | -3,263 | -6,059 | -18,323 | -20,833 | -78,767 | -238,199 | -270,829 | -1,520,809 | -19,770,517 |
Here are some more numbers to try:
Try the factor calculator