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Rust 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],
}