2520 is: • the smallest number divisible by all integers from one to ten, i.e., it is their
least common multiple. • half of 7! (
5040), meaning 7
factorial, or 1\times 2\times 3\times 4\times 5\times 6\times 7. • the product of five consecutive numbers, namely 3\times 4\times 5\times 6\times 7. • the 7th
superior highly composite number. • the 7th
colossally abundant number. • the 18th
highly composite number. • the last highly composite number that is half of the next highly composite number. • the last highly composite number that is a divisor of all following highly composite numbers. • palindromic in
undecimal (199111) and a
repdigit in bases 55, 59, and 62. • a
Harshad number in all bases between
binary and
hexadecimal. • the
aliquot sum of 1080. • part of the 53-aliquot tree. The complete
aliquot sequence starting at 1080 is 1080,
2520, 6840, 16560, 41472, 82311, 27441, 12209, 451, 53, 1, 0.
Factors The factors, also called
divisors, of 2520 are: :1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 56, 60, 63, 70, 72, 84, 90, 105, 120, 126, 140, 168, 180, 210, 252, 280, 315, 360, 420, 504, 630, 840, 1260, 2520. == References ==