Meanings (ES + gloss)
número abundante
A number that is less than the sum of its proper divisors (all divisors except the number itself).
It has been shown that the largest odd number which cannot be written as the sum of two abundant numbers is 20161.
The factors of 30 are 1, 2, 3, 5, 6, 10, 15 and 30, and 1 + 2 + 3 + 5 + 6 + 10 + 15 = 42, which is greater than 30, so 30 is an abundant number.
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