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No, prime numbers do not have proper factors.
It can be. 44 is a proper factor of 88, among other numbers.
possibly Magic in the Mirror
97 is prime. Prime numbers don't have proper factors.
70 mm. The numbers refer to the diameter of the main lens or mirror; the larger this number, the more light-gathering the telescope is, and also, the higher its resolution will be.70 mm. The numbers refer to the diameter of the main lens or mirror; the larger this number, the more light-gathering the telescope is, and also, the higher its resolution will be.70 mm. The numbers refer to the diameter of the main lens or mirror; the larger this number, the more light-gathering the telescope is, and also, the higher its resolution will be.70 mm. The numbers refer to the diameter of the main lens or mirror; the larger this number, the more light-gathering the telescope is, and also, the higher its resolution will be.