In mathematics, a colossally abundant number (sometimes abbreviated as CA) is a natural number that, in a particular rigorous sense, has many divisors. Formally, a number n is colossally abundant if and only if there is an ε > 0 such that for all k > 1,
where σ denotes the sum-of-divisors function. The first few colossally abundant numbers are 2, 6, 12, 60, 120, 360, 2520, 5040, ... (sequence A004490 in OEIS); all colossally abundant numbers are also superabundant numbers, but the converse is not true.
Read more about Colossally Abundant Number: History, Properties, Relation To The Riemann Hypothesis
Other articles related to "abundant, number, colossally abundant number":
... Mittoni and Savadoi created an experiment where the same good was abundant in one condition but scarce in another ... The scarcity condition involved a partner/competitor to create scarcity, while the abundant condition did not ... chose a good when it was scarce than when it was abundant, for two out of four sets of items (ballpoints, snacks, pencils, and key rings) ...
... Calcium is the chemical element with symbol Ca and atomic number 20 ... earth metal, and is the fifth-most-abundant element by mass in the Earth's crust ... Calcium is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate ...
... it ever fails to hold, will fail for a colossally abundant number n, thus the Riemann hypothesis is in fact equivalent to Robin's inequality holding for every colossally abundant number n > 5040 ...
... Calcium is the chemical element with symbol Ca and atomic number 20 ... Calcium is a soft gray alkaline earth metal, and is the fifth-most-abundant element by mass in the Earth's crust ... Calcium is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate ...
... Common name (Korean name) Species (Authority) Preferred habitat Range Status Family Muridae Murids Striped Field Mouse (등줄쥐) Apodemus agrarius (Pallas, 1771) Widespread ... Throughout, including Jeju ...
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