20107851520

素因数分解:

$2^8\times 5^1\times {\mathrm{199}}^1\times {\mathrm{78941}}^1$

素因数の和:79161

約数の個数: 72

約数和(自身を含む): 48407234400

約数和(自身を除く): 28299382880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 199, 256, 320, 398, 640, 796, 995, 1280, 1592, 1990, 3184, 3980, 6368, 7960, 12736, 15920, 25472, 31840, 50944, 63680, 78941, 127360, 157882, 254720, 315764, 394705, 631528, 789410, 1263056, 1578820, 2526112, 3157640, 5052224, 6315280, 10104448, 12630560, 15709259, 20208896, 25261120, 31418518, 50522240, 62837036, 78546295, 101044480, 125674072, 157092590, 251348144, 314185180, 502696288, 628370360, 1005392576, 1256740720, 2010785152, 2513481440, 4021570304, 5026962880, 10053925760, 20107851520]

約数ペア:

[(1, 20107851520), (2, 10053925760), (4, 5026962880), (5, 4021570304), (8, 2513481440), (10, 2010785152), (16, 1256740720), (20, 1005392576), (32, 628370360), (40, 502696288), (64, 314185180), (80, 251348144), (128, 157092590), (160, 125674072), (199, 101044480), (256, 78546295), (320, 62837036), (398, 50522240), (640, 31418518), (796, 25261120), (995, 20208896), (1280, 15709259), (1592, 12630560), (1990, 10104448), (3184, 6315280), (3980, 5052224), (6368, 3157640), (7960, 2526112), (12736, 1578820), (15920, 1263056), (25472, 789410), (31840, 631528), (50944, 394705), (63680, 315764), (78941, 254720), (127360, 157882)]