A:
Positive:
1 x 62052022119 x 3265895929 x 2139724973 x 8500277551 x 11261711387 x 4473832117 x 29311315427 x 40223
Negative:
-1 x -620520221-19 x -32658959-29 x -21397249-73 x -8500277-551 x -1126171-1387 x -447383-2117 x -293113-15427 x -40223
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 620,520,221, 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 | 620,520,221 | |
| -1 | -620,520,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 620,520,221.
Example:
1 x 620,520,221 = 620,520,221
and
-1 x -620,520,221 = 620,520,221
Notice both answers equal 620,520,221
With that explanation out of the way, let's continue. Next, we take the number 620,520,221 and divide it by 2:
620,520,221 ÷ 2 = 310,260,110.5
If the quotient is a whole number, then 2 and 310,260,110.5 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 | 620,520,221 | |
| -1 | -620,520,221 |
Now, we try dividing 620,520,221 by 3:
620,520,221 ÷ 3 = 206,840,073.6667
If the quotient is a whole number, then 3 and 206,840,073.6667 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 | 620,520,221 | |
| -1 | -620,520,221 |
Let's try dividing by 4:
620,520,221 ÷ 4 = 155,130,055.25
If the quotient is a whole number, then 4 and 155,130,055.25 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 | 620,520,221 | |
| -1 | 620,520,221 |
If you did it right, you will end up with this table:
| 1 | 19 | 29 | 73 | 551 | 1,387 | 2,117 | 15,427 | 40,223 | 293,113 | 447,383 | 1,126,171 | 8,500,277 | 21,397,249 | 32,658,959 | 620,520,221 |
| -1 | -19 | -29 | -73 | -551 | -1,387 | -2,117 | -15,427 | -40,223 | -293,113 | -447,383 | -1,126,171 | -8,500,277 | -21,397,249 | -32,658,959 | -620,520,221 |
Here are some more numbers to try:
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