| 释义 |
- In mathematics Factors
- References
{{Infobox number
| number = 2520
}}2520 (two thousand five hundred twenty) is the natural number following 2519 and preceding 2521. In mathematics2520 is: - the smallest number divisible by all integers from 1 to 10, i.e., it is their least common multiple.
- half of 7! (5040), meaning 7 factorial, or 1×2×3×4×5×6×7.
- the product of five consecutive numbers, namely 3×4×5×6×7.
- a superior highly composite number.
- a colossally abundant number.
- the last highly composite number which is half of the next highly composite number.[1]
- the last highly composite number that is a divisor of all following highly composite numbers.[2]
- palindromic in bases 11 (199111), and a repdigit in bases 55, 59 and 62.
- a Harshad number in bases 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 and 16.
- 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.[3] References 1. ^{{Cite OEIS|1=A072938|2=}}
2. ^{{Cite OEIS|1=A106037|2=}}
3. ^{{cite web|url=http://numberworld.info/2520|title=properties of 2520|work=NumberWorld.info}}
1 : Integers |