A:
Positive:
1 x 21504917 x 30721341 x 5245159 x 36449127 x 16933287 x 7493413 x 5207889 x 2419
Negative:
-1 x -2150491-7 x -307213-41 x -52451-59 x -36449-127 x -16933-287 x -7493-413 x -5207-889 x -2419
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 2,150,491, 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 | 2,150,491 | |
| -1 | -2,150,491 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,150,491.
Example:
1 x 2,150,491 = 2,150,491
and
-1 x -2,150,491 = 2,150,491
Notice both answers equal 2,150,491
With that explanation out of the way, let's continue. Next, we take the number 2,150,491 and divide it by 2:
2,150,491 ÷ 2 = 1,075,245.5
If the quotient is a whole number, then 2 and 1,075,245.5 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 | 2,150,491 | |
| -1 | -2,150,491 |
Now, we try dividing 2,150,491 by 3:
2,150,491 ÷ 3 = 716,830.3333
If the quotient is a whole number, then 3 and 716,830.3333 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 | 2,150,491 | |
| -1 | -2,150,491 |
Let's try dividing by 4:
2,150,491 ÷ 4 = 537,622.75
If the quotient is a whole number, then 4 and 537,622.75 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 | 2,150,491 | |
| -1 | 2,150,491 |
If you did it right, you will end up with this table:
| 1 | 7 | 41 | 59 | 127 | 287 | 413 | 889 | 2,419 | 5,207 | 7,493 | 16,933 | 36,449 | 52,451 | 307,213 | 2,150,491 |
| -1 | -7 | -41 | -59 | -127 | -287 | -413 | -889 | -2,419 | -5,207 | -7,493 | -16,933 | -36,449 | -52,451 | -307,213 | -2,150,491 |
Here are some more numbers to try:
Try the factor calculator