n
u
m
b
e
r
1
2
0
0
n
u
m
b
e
r
2
2
0
2
×
2
×
2
×
5
×
5
2
×
2
×
5
t
h
e
c
o
m
m
o
n
f
a
c
t
o
r
s
o
f
2
0
0
a
n
d
2
0
a
r
e
2
,
2
,
5
g
c
d
(
2
0
0
,
2
0
)
=
2
×
2
×
5
=
2
0