21122660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{593}}^1$

素因数の和:752

約数の個数: 48

約数和(自身を含む): 48199536

約数和(自身を除く): 27076876

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 137, 260, 274, 548, 593, 685, 1186, 1370, 1781, 2372, 2740, 2965, 3562, 5930, 7124, 7709, 8905, 11860, 15418, 17810, 30836, 35620, 38545, 77090, 81241, 154180, 162482, 324964, 406205, 812410, 1056133, 1624820, 2112266, 4224532, 5280665, 10561330, 21122660]

約数ペア:

[(1, 21122660), (2, 10561330), (4, 5280665), (5, 4224532), (10, 2112266), (13, 1624820), (20, 1056133), (26, 812410), (52, 406205), (65, 324964), (130, 162482), (137, 154180), (260, 81241), (274, 77090), (548, 38545), (593, 35620), (685, 30836), (1186, 17810), (1370, 15418), (1781, 11860), (2372, 8905), (2740, 7709), (2965, 7124), (3562, 5930)]