A:
Positive:
1 x 1613211117 x 23045873157 x 1027523229 x 704459641 x 2516711099 x 1467891603 x 1006374487 x 35953
Negative:
-1 x -161321111-7 x -23045873-157 x -1027523-229 x -704459-641 x -251671-1099 x -146789-1603 x -100637-4487 x -35953
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 161,321,111, 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 | 161,321,111 | |
| -1 | -161,321,111 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,321,111.
Example:
1 x 161,321,111 = 161,321,111
and
-1 x -161,321,111 = 161,321,111
Notice both answers equal 161,321,111
With that explanation out of the way, let's continue. Next, we take the number 161,321,111 and divide it by 2:
161,321,111 ÷ 2 = 80,660,555.5
If the quotient is a whole number, then 2 and 80,660,555.5 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 | 161,321,111 | |
| -1 | -161,321,111 |
Now, we try dividing 161,321,111 by 3:
161,321,111 ÷ 3 = 53,773,703.6667
If the quotient is a whole number, then 3 and 53,773,703.6667 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 | 161,321,111 | |
| -1 | -161,321,111 |
Let's try dividing by 4:
161,321,111 ÷ 4 = 40,330,277.75
If the quotient is a whole number, then 4 and 40,330,277.75 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 | 161,321,111 | |
| -1 | 161,321,111 |
If you did it right, you will end up with this table:
| 1 | 7 | 157 | 229 | 641 | 1,099 | 1,603 | 4,487 | 35,953 | 100,637 | 146,789 | 251,671 | 704,459 | 1,027,523 | 23,045,873 | 161,321,111 |
| -1 | -7 | -157 | -229 | -641 | -1,099 | -1,603 | -4,487 | -35,953 | -100,637 | -146,789 | -251,671 | -704,459 | -1,027,523 | -23,045,873 | -161,321,111 |
Here are some more numbers to try:
Try the factor calculator