| have exactly 2 divisors, and are in bold | , Number Theory and its History, McGraw—Hill, NY, 1944 and Dover reprints |
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| It can also be said that 42 is divisible by 7, 42 is a of 7, 7 divides 42, or 7 is a factor of 42 | The positive divisors of 42 are 1, 2, 3, 6, 7, 14, 21, 42 |
1986 , Abstract Algebra, New York: Macmillan Publishing Company, ISBN 0-02-353820-1• , Number Theory and its History, McGraw—Hill, NY, 1944 and Dover reprints.
| It can also be said that 42 is divisible by 7, 42 is a of 7, 7 divides 42, or 7 is a factor of 42 | 1986 , Abstract Algebra, New York: Macmillan Publishing Company, ISBN 0-02-353820-1• , Unsolved Problems in Number Theory 3rd ed , , 2004 ; section B |
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| have exactly 2 divisors, and are in bold |
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