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Java Taskbook Level 10.5

Given a number, display the process of factoring the number into prime factors, as in school.

Given an arbitrary two-dimensional array:

{
	{11, 12, 13, 14, 15},
	{21, 22, 23, 24, 25},
	{31, 32, 33, 34, 35},
	{41, 42, 43, 44, 45},
	{51, 52, 53, 54, 55},
}

Zero out the elements of its main diagonal:

{
	{ 0, 12, 13, 14, 15},
	{21,  0, 23, 24, 25},
	{31, 32,  0, 34, 35},
	{41, 42, 43,  0, 45},
	{51, 52, 53, 54,  0},
}