Finite Group Databasebeta

(C2×D7)⋊Dic15 #13132141

order1680
automorphism?
homologyAbelianization (H1) = C2×C4 · Schur multiplier (H2) = C22

Aliases

unambiguous semidirect product(C2×D7)⋊Dic15

Splittings

HallC3×C5×C7 ⋊ C22⋊C4
HallC5×C7 ⋊ #217
HallC3×C7 ⋊ C22⋊Dic5
HallC3×C5 ⋊ (C2×D7)⋊C4
SylowC7 ⋊ #6719
SylowC5 ⋊ (C2×D7)⋊Dic3
SylowC3 ⋊ (C2×D7)⋊Dic5

Subgroups

subgroupG/H
center, Frattini, hypercenterC22D7×D15
commutatorC2×C3×C5×C7C2×C4
Fitting, socle, cosocleC22×C3×C5×C7C22
prime radicalC22×C3×C5×D7C2
hypocenterC3×C5×C7C22⋊C4
LCSG ▷ C2×C3×C5×C7 ▷ C3×C5×C7
UCSC1 ◁ C22

136 conjugacy classes of subgroups; only the 56 normal subgroups are shown.

normal subgroups only

This group has 136 conjugacy classes of subgroups — too many to draw. Only its 56 normal subgroups are shown.

Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.

Full subgroup data →

Presentation

transitive degreeμt(G) = 840

Polycyclic presentation:

2^4,3,5,7|b^2=c,b^a=bd,g^a=g^6,e^b=e^2,f^b=f^4

Conjugacy classes & character table

174 conjugacy classes — view the full character table.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(1680, 161);