Английская Википедия:207 (number)

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Шаблон:Infobox number 207 (two hundred [and] seven) is the natural number following 206 and preceding 208. It is an odd composite number with a prime factorization of <math>3^2\cdot 23</math>.

In Mathematics

207 is a Wedderburn-Etherington number.[1] There are exactly 207 different matchstick graphs with eight edges.[2][3] 207 is also a deficient number, as 207's proper divisors (divisors not including the number itself) only add up to 105: <math>1+3+9+23+69=105<207.</math>

See also

References

Шаблон:Reflist Шаблон:Integers


Шаблон:Number-stub