19915700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1237}}^1$

素因数の和:1281

約数の個数: 72

約数和(自身を含む): 51580032

約数和(自身を除く): 31664332

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 25, 28, 35, 46, 50, 70, 92, 100, 115, 140, 161, 175, 230, 322, 350, 460, 575, 644, 700, 805, 1150, 1237, 1610, 2300, 2474, 3220, 4025, 4948, 6185, 8050, 8659, 12370, 16100, 17318, 24740, 28451, 30925, 34636, 43295, 56902, 61850, 86590, 113804, 123700, 142255, 173180, 199157, 216475, 284510, 398314, 432950, 569020, 711275, 796628, 865900, 995785, 1422550, 1991570, 2845100, 3983140, 4978925, 9957850, 19915700]

約数ペア:

[(1, 19915700), (2, 9957850), (4, 4978925), (5, 3983140), (7, 2845100), (10, 1991570), (14, 1422550), (20, 995785), (23, 865900), (25, 796628), (28, 711275), (35, 569020), (46, 432950), (50, 398314), (70, 284510), (92, 216475), (100, 199157), (115, 173180), (140, 142255), (161, 123700), (175, 113804), (230, 86590), (322, 61850), (350, 56902), (460, 43295), (575, 34636), (644, 30925), (700, 28451), (805, 24740), (1150, 17318), (1237, 16100), (1610, 12370), (2300, 8659), (2474, 8050), (3220, 6185), (4025, 4948)]