20805123456

素因数分解:

$2^7\times 3^7\times {\mathrm{13}}^1\times {\mathrm{5717}}^1$

素因数の和:5765

約数の個数: 256

約数和(自身を含む): 66955492800

約数和(自身を除く): 46150369344

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 27, 32, 36, 39, 48, 52, 54, 64, 72, 78, 81, 96, 104, 108, 117, 128, 144, 156, 162, 192, 208, 216, 234, 243, 288, 312, 324, 351, 384, 416, 432, 468, 486, 576, 624, 648, 702, 729, 832, 864, 936, 972, 1053, 1152, 1248, 1296, 1404, 1458, 1664, 1728, 1872, 1944, 2106, 2187, 2496, 2592, 2808, 2916, 3159, 3456, 3744, 3888, 4212, 4374, 4992, 5184, 5616, 5717, 5832, 6318, 7488, 7776, 8424, 8748, 9477, 10368, 11232, 11434, 11664, 12636, 14976, 15552, 16848, 17151, 17496, 18954, 22464, 22868, 23328, 25272, 28431, 31104, 33696, 34302, 34992, 37908, 44928, 45736, 46656, 50544, 51453, 56862, 67392, 68604, 69984, 74321, 75816, 91472, 93312, 101088, 102906, 113724, 134784, 137208, 139968, 148642, 151632, 154359, 182944, 202176, 205812, 222963, 227448, 274416, 279936, 297284, 303264, 308718, 365888, 404352, 411624, 445926, 454896, 463077, 548832, 594568, 606528, 617436, 668889, 731776, 823248, 891852, 909792, 926154, 1097664, 1189136, 1213056, 1234872, 1337778, 1389231, 1646496, 1783704, 1819584, 1852308, 2006667, 2195328, 2378272, 2469744, 2675556, 2778462, 3292992, 3567408, 3639168, 3704616, 4013334, 4167693, 4756544, 4939488, 5351112, 5556924, 6020001, 6585984, 7134816, 7409232, 8026668, 8335386, 9513088, 9878976, 10702224, 11113848, 12040002, 12503079, 14269632, 14818464, 16053336, 16670772, 18060003, 19757952, 21404448, 22227696, 24080004, 25006158, 28539264, 29636928, 32106672, 33341544, 36120006, 42808896, 44455392, 48160008, 50012316, 54180009, 59273856, 64213344, 66683088, 72240012, 85617792, 88910784, 96320016, 100024632, 108360018, 128426688, 133366176, 144480024, 162540027, 177821568, 192640032, 200049264, 216720036, 256853376, 266732352, 288960048, 325080054, 385280064, 400098528, 433440072, 533464704, 577920096, 650160108, 770560128, 800197056, 866880144, 1155840192, 1300320216, 1600394112, 1733760288, 2311680384, 2600640432, 3467520576, 5201280864, 6935041152, 10402561728, 20805123456]

約数ペア:

[(1, 20805123456), (2, 10402561728), (3, 6935041152), (4, 5201280864), (6, 3467520576), (8, 2600640432), (9, 2311680384), (12, 1733760288), (13, 1600394112), (16, 1300320216), (18, 1155840192), (24, 866880144), (26, 800197056), (27, 770560128), (32, 650160108), (36, 577920096), (39, 533464704), (48, 433440072), (52, 400098528), (54, 385280064), (64, 325080054), (72, 288960048), (78, 266732352), (81, 256853376), (96, 216720036), (104, 200049264), (108, 192640032), (117, 177821568), (128, 162540027), (144, 144480024), (156, 133366176), (162, 128426688), (192, 108360018), (208, 100024632), (216, 96320016), (234, 88910784), (243, 85617792), (288, 72240012), (312, 66683088), (324, 64213344), (351, 59273856), (384, 54180009), (416, 50012316), (432, 48160008), (468, 44455392), (486, 42808896), (576, 36120006), (624, 33341544), (648, 32106672), (702, 29636928), (729, 28539264), (832, 25006158), (864, 24080004), (936, 22227696), (972, 21404448), (1053, 19757952), (1152, 18060003), (1248, 16670772), (1296, 16053336), (1404, 14818464), (1458, 14269632), (1664, 12503079), (1728, 12040002), (1872, 11113848), (1944, 10702224), (2106, 9878976), (2187, 9513088), (2496, 8335386), (2592, 8026668), (2808, 7409232), (2916, 7134816), (3159, 6585984), (3456, 6020001), (3744, 5556924), (3888, 5351112), (4212, 4939488), (4374, 4756544), (4992, 4167693), (5184, 4013334), (5616, 3704616), (5717, 3639168), (5832, 3567408), (6318, 3292992), (7488, 2778462), (7776, 2675556), (8424, 2469744), (8748, 2378272), (9477, 2195328), (10368, 2006667), (11232, 1852308), (11434, 1819584), (11664, 1783704), (12636, 1646496), (14976, 1389231), (15552, 1337778), (16848, 1234872), (17151, 1213056), (17496, 1189136), (18954, 1097664), (22464, 926154), (22868, 909792), (23328, 891852), (25272, 823248), (28431, 731776), (31104, 668889), (33696, 617436), (34302, 606528), (34992, 594568), (37908, 548832), (44928, 463077), (45736, 454896), (46656, 445926), (50544, 411624), (51453, 404352), (56862, 365888), (67392, 308718), (68604, 303264), (69984, 297284), (74321, 279936), (75816, 274416), (91472, 227448), (93312, 222963), (101088, 205812), (102906, 202176), (113724, 182944), (134784, 154359), (137208, 151632), (139968, 148642)]