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  • 兩個(gè)合數(shù)是素?cái)?shù),它們的最小公倍數(shù)是260,求兩個(gè)數(shù).

    兩個(gè)合數(shù)是素?cái)?shù),它們的最小公倍數(shù)是260,求兩個(gè)數(shù).
    其他人氣:665 ℃時(shí)間:2019-09-22 08:40:08
    優(yōu)質(zhì)解答
      樓上說錯(cuò)了
      20+13=33不是素?cái)?shù)啊,不滿足樓主說的條件
      不過我用VB模擬了一下,就誒過仍然算不出樓主的謎底.
      話說真的有這樣的數(shù)字嗎?是不是樓主條件錯(cuò)了?
      下面是我的代碼:
      Option Base 1
      Dim counter As Long
      Dim a() As Long
      Private Sub Command1_Click()
      Dim x As Long
      Dim y As Long
      counter = 0
      For var = 1 To 260
      got var
      Next var
      Print counter
      For x = 1 To counter
      For y = 1 To counter
      If a(x) > a(y) Then
      If a(x) * a(y) / 260 = MOD_(a(x),a(y)) Then
      Text1.Text = Text1.Text & a(x) & "—" & a(y) & Chr(13) & Chr(10)
      If pan(a(x) + a(y)) Then
      Text2.Text = Text2.Text & a(x) & "—" & a(y) & Chr(13) & Chr(10)
      End If
      End If
      Else
      If a(x) * a(y) / 260 = MOD_(a(y),a(x)) Then
      Text1.Text = Text1.Text & a(x) & "—" & a(y) & Chr(13) & Chr(10)
      If pan(a(x) + a(y)) Then
      Text2.Text = Text2.Text & a(x) & "—" & a(y) & Chr(13) & Chr(10)
      End If
      End If
      End If
      Next y
      Next x
      End Sub
      Function MOD_(ByVal x As Long,ByVal y As Long) As Long
      Do
      t = x Mod y
      x = y
      y = t
      Loop While t 0
      MOD_ = x
      End Function
      Private Sub got(ByVal var As Long)
      flag = 0
      For i = 2 To Int(Sqr(var))
      If var Mod i = 0 Then
      flag = flag + 1
      End If
      Next i
      If flag > 0 Then
      counter = counter + 1
      ReDim Preserve a(counter)
      a(counter) = var
      End If
      End Sub
      Function pan(ByVal var As Long) As Boolean
      flag = 0
      For i = 2 To Int(Sqr(var))
      If var Mod i = 0 Then
      flag = flag + 1
      End If
      Next i
      If flag = 0 Then
      pan = True
      Else
      pan = False
      End If
      End Function
      代碼是沒有錯(cuò)誤的,我已經(jīng)試驗(yàn)很多次了.
      如果我錯(cuò)了,煩請樓主知道答案時(shí)告訴我一聲.
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