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| a positive number that is equal to the sum of all positive integers that are submultiples of it, as 6, which is equal to the sum of 1, 2, and 3 |
| one of the positive or negative numbers 1, 2, 3, or zero |
| common divisor
A number that is a factor of two or more numbers. For example, 3 is a common divisor of both 9 and 15. Also called common factor. |