207 (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 .
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| Cardinal | two hundred seven | |||
| Ordinal | 207th (two hundred seventh) | |||
| Factorization | 32 × 23 | |||
| Divisors | 1, 3, 9, 23, 69, 207 | |||
| Greek numeral | ΣΖ´ | |||
| Roman numeral | CCVII | |||
| Binary | 110011112 | |||
| Ternary | 212003 | |||
| Octal | 3178 | |||
| Duodecimal | 15312 | |||
| Hexadecimal | CF16 | |||
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:
See also
References
- Sloane, N. J. A. (ed.). "Sequence A001190 (Wedderburn-Etherington numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Sloane, N. J. A. (ed.). "Sequence A066951 (Number of nonisomorphic connected graphs that can be drawn in the plane using n unit-length edges)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Salvia, Raffaele (2013). "A catalog for matchstick graphs". arXiv:1303.5965 [math.CO].
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