HCD: find missing

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Across
  1. 3. HCD(287,?)=12
  2. 4. HCD(x,?)=19
  3. 5. HCD(?,105)=98
  4. 7. HCD(18273,?)=115
Down
  1. 1. HCD(9176,?)=72
  2. 2. HCD(?,917)=5
  3. 4. HCD(826,?)=35
  4. 5. HCD(?,x)=85
  5. 6. HCD(28172,?)=108