A:
Positive:
1 x 420125517 x 600179349 x 85739967 x 627053191 x 219961469 x 895791337 x 314233283 x 127974489 x 9359
Negative:
-1 x -42012551-7 x -6001793-49 x -857399-67 x -627053-191 x -219961-469 x -89579-1337 x -31423-3283 x -12797-4489 x -9359
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 42,012,551, 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 | 42,012,551 | |
| -1 | -42,012,551 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,012,551.
Example:
1 x 42,012,551 = 42,012,551
and
-1 x -42,012,551 = 42,012,551
Notice both answers equal 42,012,551
With that explanation out of the way, let's continue. Next, we take the number 42,012,551 and divide it by 2:
42,012,551 ÷ 2 = 21,006,275.5
If the quotient is a whole number, then 2 and 21,006,275.5 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 | 42,012,551 | |
| -1 | -42,012,551 |
Now, we try dividing 42,012,551 by 3:
42,012,551 ÷ 3 = 14,004,183.6667
If the quotient is a whole number, then 3 and 14,004,183.6667 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 | 42,012,551 | |
| -1 | -42,012,551 |
Let's try dividing by 4:
42,012,551 ÷ 4 = 10,503,137.75
If the quotient is a whole number, then 4 and 10,503,137.75 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 | 42,012,551 | |
| -1 | 42,012,551 |
If you did it right, you will end up with this table:
| 1 | 7 | 49 | 67 | 191 | 469 | 1,337 | 3,283 | 4,489 | 9,359 | 12,797 | 31,423 | 89,579 | 219,961 | 627,053 | 857,399 | 6,001,793 | 42,012,551 |
| -1 | -7 | -49 | -67 | -191 | -469 | -1,337 | -3,283 | -4,489 | -9,359 | -12,797 | -31,423 | -89,579 | -219,961 | -627,053 | -857,399 | -6,001,793 | -42,012,551 |
Here are some more numbers to try:
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