a : 24 = C1 + 4
a : 40 = C2 + 4
a : 58 = C3 + 4
a=M24 + 4
a=M40 + 4
a=M58 + 4
[24,40,58] = 2^4 * 5 * 3 = 240
24=2^3 * 3
40=2^3 * 5
58=2^4 * 3
a=240+4 = 244.
