A number is said to be divisible by if is a divisor of .

The function Divisible[n, d] returns True if an integer is divisible by an integer .

The product of any consecutive integers is divisible by . The sum of any consecutive integers is divisible by if is odd, and by if is even.

Guy, R. K. "Divisibility." Ch. B in Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, pp. 44-104, 1994.

Jones, G. A. and Jones, J. M. "Divisibility." Ch. 1 in Elementary Number Theory. Berlin: Springer-Verlag, pp. 1-17, 1998.

Nagell, T. "Divisibility." Ch. 1 in Introduction to Number Theory. New York: Wiley, pp. 11-46, 1951.

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Weisstein, Eric W. "Divisible." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Divisible.html