20805840

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:138

約数の個数: 240

約数和(自身を含む): 79387776

約数和(自身を除く): 58581936

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 37, 40, 44, 45, 48, 55, 60, 66, 71, 72, 74, 80, 88, 90, 99, 110, 111, 120, 132, 142, 144, 148, 165, 176, 180, 185, 198, 213, 220, 222, 240, 264, 284, 296, 330, 333, 355, 360, 370, 396, 407, 426, 440, 444, 495, 528, 555, 568, 592, 639, 660, 666, 710, 720, 740, 781, 792, 814, 852, 880, 888, 990, 1065, 1110, 1136, 1221, 1278, 1320, 1332, 1420, 1480, 1562, 1584, 1628, 1665, 1704, 1776, 1980, 2035, 2130, 2220, 2343, 2442, 2556, 2627, 2640, 2664, 2840, 2960, 3124, 3195, 3256, 3330, 3408, 3663, 3905, 3960, 4070, 4260, 4440, 4686, 4884, 5112, 5254, 5328, 5680, 6105, 6248, 6390, 6512, 6660, 7029, 7326, 7810, 7881, 7920, 8140, 8520, 8880, 9372, 9768, 10224, 10508, 11715, 12210, 12496, 12780, 13135, 13320, 14058, 14652, 15620, 15762, 16280, 17040, 18315, 18744, 19536, 21016, 23430, 23643, 24420, 25560, 26270, 26640, 28116, 28897, 29304, 31240, 31524, 32560, 35145, 36630, 37488, 39405, 42032, 46860, 47286, 48840, 51120, 52540, 56232, 57794, 58608, 62480, 63048, 70290, 73260, 78810, 86691, 93720, 94572, 97680, 105080, 112464, 115588, 118215, 126096, 140580, 144485, 146520, 157620, 173382, 187440, 189144, 210160, 231176, 236430, 260073, 281160, 288970, 293040, 315240, 346764, 378288, 433455, 462352, 472860, 520146, 562320, 577940, 630480, 693528, 866910, 945720, 1040292, 1155880, 1300365, 1387056, 1733820, 1891440, 2080584, 2311760, 2600730, 3467640, 4161168, 5201460, 6935280, 10402920, 20805840]

約数ペア:

[(1, 20805840), (2, 10402920), (3, 6935280), (4, 5201460), (5, 4161168), (6, 3467640), (8, 2600730), (9, 2311760), (10, 2080584), (11, 1891440), (12, 1733820), (15, 1387056), (16, 1300365), (18, 1155880), (20, 1040292), (22, 945720), (24, 866910), (30, 693528), (33, 630480), (36, 577940), (37, 562320), (40, 520146), (44, 472860), (45, 462352), (48, 433455), (55, 378288), (60, 346764), (66, 315240), (71, 293040), (72, 288970), (74, 281160), (80, 260073), (88, 236430), (90, 231176), (99, 210160), (110, 189144), (111, 187440), (120, 173382), (132, 157620), (142, 146520), (144, 144485), (148, 140580), (165, 126096), (176, 118215), (180, 115588), (185, 112464), (198, 105080), (213, 97680), (220, 94572), (222, 93720), (240, 86691), (264, 78810), (284, 73260), (296, 70290), (330, 63048), (333, 62480), (355, 58608), (360, 57794), (370, 56232), (396, 52540), (407, 51120), (426, 48840), (440, 47286), (444, 46860), (495, 42032), (528, 39405), (555, 37488), (568, 36630), (592, 35145), (639, 32560), (660, 31524), (666, 31240), (710, 29304), (720, 28897), (740, 28116), (781, 26640), (792, 26270), (814, 25560), (852, 24420), (880, 23643), (888, 23430), (990, 21016), (1065, 19536), (1110, 18744), (1136, 18315), (1221, 17040), (1278, 16280), (1320, 15762), (1332, 15620), (1420, 14652), (1480, 14058), (1562, 13320), (1584, 13135), (1628, 12780), (1665, 12496), (1704, 12210), (1776, 11715), (1980, 10508), (2035, 10224), (2130, 9768), (2220, 9372), (2343, 8880), (2442, 8520), (2556, 8140), (2627, 7920), (2640, 7881), (2664, 7810), (2840, 7326), (2960, 7029), (3124, 6660), (3195, 6512), (3256, 6390), (3330, 6248), (3408, 6105), (3663, 5680), (3905, 5328), (3960, 5254), (4070, 5112), (4260, 4884), (4440, 4686)]