A:
Positive:
1 x 6201426655 x 12402853353 x 1170080573 x 8495105265 x 2340161365 x 16990213869 x 16028519345 x 32057
Negative:
-1 x -620142665-5 x -124028533-53 x -11700805-73 x -8495105-265 x -2340161-365 x -1699021-3869 x -160285-19345 x -32057
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 620,142,665, 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 | 620,142,665 | |
| -1 | -620,142,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 620,142,665.
Example:
1 x 620,142,665 = 620,142,665
and
-1 x -620,142,665 = 620,142,665
Notice both answers equal 620,142,665
With that explanation out of the way, let's continue. Next, we take the number 620,142,665 and divide it by 2:
620,142,665 ÷ 2 = 310,071,332.5
If the quotient is a whole number, then 2 and 310,071,332.5 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 | 620,142,665 | |
| -1 | -620,142,665 |
Now, we try dividing 620,142,665 by 3:
620,142,665 ÷ 3 = 206,714,221.6667
If the quotient is a whole number, then 3 and 206,714,221.6667 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 | 620,142,665 | |
| -1 | -620,142,665 |
Let's try dividing by 4:
620,142,665 ÷ 4 = 155,035,666.25
If the quotient is a whole number, then 4 and 155,035,666.25 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 | 620,142,665 | |
| -1 | 620,142,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 53 | 73 | 265 | 365 | 3,869 | 19,345 | 32,057 | 160,285 | 1,699,021 | 2,340,161 | 8,495,105 | 11,700,805 | 124,028,533 | 620,142,665 |
| -1 | -5 | -53 | -73 | -265 | -365 | -3,869 | -19,345 | -32,057 | -160,285 | -1,699,021 | -2,340,161 | -8,495,105 | -11,700,805 | -124,028,533 | -620,142,665 |
Here are some more numbers to try:
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