Английская Википедия:720 (number)

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Шаблон:Infobox number 720 (seven hundred [and] twenty) is the natural number following 719 and preceding 721.

It is 6! (6 factorial) and a composite number with thirty divisors, more than any number below, making it a highly composite number.[1] It is a Harshad number in every base from binary to decimal.

720 is expressible as the product of consecutive integers in two different ways: Шаблон:Math and Шаблон:Math. [2]

There are 49 solutions to the equation Шаблон:Math, more than any integer below it, making 720 a highly totient number.

720 is a 241-gonal number.

In other fields

720 is:

For the year AD, see 720.

References

Шаблон:Integers