21940

21940 is a natural number that follows 21939 and precedes 21941. It is an even and composite integer.

Its prime factorization is 2^2 × 5 × 1097. The positive divisors of 21940 are 1, 2, 4, 5, 10, 20, 1097, 2194, 4388, 5485, 10970, and 21940. The sum of all positive divisors is 46,116, and the sum of proper divisors (excluding the number itself) is 24,176. Because the sum of proper divisors exceeds 21940, 21940 is classified as an abundant number in number theory.

21940 is divisible by 20 (since 21940 ÷ 20 = 1097) and ends with a zero, reflecting its factorization that includes both 4 and 5. In hexadecimal notation, 21940 is 0x55B4.

As a plain integer, 21940 may appear in various mathematical contexts, calculations, catalogs, or identifiers. Beyond its standard numerical properties, there is no widely recognized cultural or historical attribute specific to 21940.