A:
Positive:
1 x 812104455 x 1624208917 x 477708543 x 188861585 x 955417215 x 377723289 x 281005731 x 1110951307 x 621351445 x 562013655 x 222196535 x 12427
Negative:
-1 x -81210445-5 x -16242089-17 x -4777085-43 x -1888615-85 x -955417-215 x -377723-289 x -281005-731 x -111095-1307 x -62135-1445 x -56201-3655 x -22219-6535 x -12427
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 81,210,445, 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 | 81,210,445 | |
| -1 | -81,210,445 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 81,210,445.
Example:
1 x 81,210,445 = 81,210,445
and
-1 x -81,210,445 = 81,210,445
Notice both answers equal 81,210,445
With that explanation out of the way, let's continue. Next, we take the number 81,210,445 and divide it by 2:
81,210,445 ÷ 2 = 40,605,222.5
If the quotient is a whole number, then 2 and 40,605,222.5 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 | 81,210,445 | |
| -1 | -81,210,445 |
Now, we try dividing 81,210,445 by 3:
81,210,445 ÷ 3 = 27,070,148.3333
If the quotient is a whole number, then 3 and 27,070,148.3333 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 | 81,210,445 | |
| -1 | -81,210,445 |
Let's try dividing by 4:
81,210,445 ÷ 4 = 20,302,611.25
If the quotient is a whole number, then 4 and 20,302,611.25 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 | 81,210,445 | |
| -1 | 81,210,445 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 43 | 85 | 215 | 289 | 731 | 1,307 | 1,445 | 3,655 | 6,535 | 12,427 | 22,219 | 56,201 | 62,135 | 111,095 | 281,005 | 377,723 | 955,417 | 1,888,615 | 4,777,085 | 16,242,089 | 81,210,445 |
| -1 | -5 | -17 | -43 | -85 | -215 | -289 | -731 | -1,307 | -1,445 | -3,655 | -6,535 | -12,427 | -22,219 | -56,201 | -62,135 | -111,095 | -281,005 | -377,723 | -955,417 | -1,888,615 | -4,777,085 | -16,242,089 | -81,210,445 |
Here are some more numbers to try:
Try the factor calculator