* The product of their masses: This means that the more massive the objects are, the stronger the gravitational force between them.

* The inverse square of the distance between their centers: This means that as the distance between the objects increases, the gravitational force decreases rapidly.

In mathematical terms:

F = G * (m1 * m2) / r^2

Where:

* F is the gravitational force

* G is the gravitational constant (approximately 6.674 × 10^-11 m^3 kg^-1 s^-2)

* m1 and m2 are the masses of the two objects

* r is the distance between their centers