A:
Positive:
1 x 19778997 x 28255711 x 17980917 x 11634777 x 25687119 x 16621187 x 105771309 x 1511
Negative:
-1 x -1977899-7 x -282557-11 x -179809-17 x -116347-77 x -25687-119 x -16621-187 x -10577-1309 x -1511
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 1,977,899, 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 | 1,977,899 | |
| -1 | -1,977,899 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,977,899.
Example:
1 x 1,977,899 = 1,977,899
and
-1 x -1,977,899 = 1,977,899
Notice both answers equal 1,977,899
With that explanation out of the way, let's continue. Next, we take the number 1,977,899 and divide it by 2:
1,977,899 ÷ 2 = 988,949.5
If the quotient is a whole number, then 2 and 988,949.5 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 | 1,977,899 | |
| -1 | -1,977,899 |
Now, we try dividing 1,977,899 by 3:
1,977,899 ÷ 3 = 659,299.6667
If the quotient is a whole number, then 3 and 659,299.6667 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 | 1,977,899 | |
| -1 | -1,977,899 |
Let's try dividing by 4:
1,977,899 ÷ 4 = 494,474.75
If the quotient is a whole number, then 4 and 494,474.75 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 | 1,977,899 | |
| -1 | 1,977,899 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 77 | 119 | 187 | 1,309 | 1,511 | 10,577 | 16,621 | 25,687 | 116,347 | 179,809 | 282,557 | 1,977,899 |
| -1 | -7 | -11 | -17 | -77 | -119 | -187 | -1,309 | -1,511 | -10,577 | -16,621 | -25,687 | -116,347 | -179,809 | -282,557 | -1,977,899 |
Here are some more numbers to try:
Try the factor calculator