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Byju's Answer
Standard X
Mathematics
Prime Factorisation
In how many w...
Question
In how many ways can the number
7056
be resolved into two factors?
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Solution
7056
=
2
4
×
3
2
×
7
2
A number of form
a
p
b
q
c
r
.
.
.
where
a
,
b
,
c
are all prime and
p
,
q
,
r
are all even can be resolved in two factors in
1
2
[
(
p
+
1
)
(
q
+
1
)
(
r
+
1
)
.
.
.
.
+
1
]
ways
So number of ways of resolving the number
=
1
2
{
(
4
+
1
)
(
2
+
1
)
(
2
+
1
)
+
1
}
=
46
2
=
23
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