“70,000”的意思、由来-开放百科全书

词条

70,000

释义

Selected numbers in the range 70,001–79,999
70,001 to 70,999 71,000 to 70,999 72,000 to 72,999 73,000 to 73,999 74,000 to 74,999 75,000 to 75,999 76,000 to 76,999 77,000 to 77,999 78,000 to 78,999 79,000 to 79,999
References

70,000 (seventy thousand) is the natural number that comes after 69,999 and before 70,001. It is a round number.

Selected numbers in the range 70,001–79,999

70,001 to 70,999

71,000 to 70,999

71,656 – pentagonal pyramidal number

72,000 to 72,999

73,000 to 73,999

73,440 – 15 × 16 × 17 × 18
73,712 – number of n-Queens Problem solutions for n = 13
73,728 – 3-smooth number
73,774 - used in marketing Pepsi, the number dialed if the letters of "Pepsi" are entered on a telephone keypad{{importance inline}}

74,000 to 74,999

74,088 – 42³
74,205 – registry number of the USS Defiant on Deep Space Nine
74,656 – registry number of the USS Voyager on Voyager

75,000 to 75,999

75,025 – Fibonacci number,^[1] Markov number^[2]
75,361 – Carmichael number^[3]

76,000 to 76,999

76,084 – amicable number with 63020
76,176 – sum of the cubes of the first 23 positive integers
76,424 – tetranacci number^[4]

77,000 to 77,999

77,778 – Kaprekar number^[5]

78,000 to 78,999

78,125 – 5⁷
78,557 – conjectured to be the smallest Sierpiński number
78,732 – 3-smooth number

79,000 to 79,999

79,507 – 43³

References

1. ^{{Cite web|url=https://oeis.org/A000045|title=Sloane's A000045 : Fibonacci numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-06-16}}
2. ^{{Cite web|url=https://oeis.org/A002559|title=Sloane's A002559 : Markoff (or Markov) numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-06-16}}
3. ^{{Cite web|url=https://oeis.org/A002997|title=Sloane's A002997 : Carmichael numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-06-16}}
4. ^{{Cite web|url=https://oeis.org/A000078|title=Sloane's A000078 : Tetranacci numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-06-16}}
5. ^{{Cite web|url=https://oeis.org/A006886|title=Sloane's A006886 : Kaprekar numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-06-16}}

1 : Integers

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