caution used to justify preemptive measures that are likely not strictly necessary (often as "out of an abundance of caution")

(number theory) A number that is less than the sum of its proper divisors (all divisors except the number itself).

plural of abundant number

In the Jewish calendar, a year of 355 days or a leap year of 385 days; perfect year.

plural of abundant year

(mathematics) The divisor function of an integer divided by the integer.