21657840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:159

約数の個数: 160

約数和(自身を含む): 71995392

約数和(自身を除く): 50337552

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 31, 40, 41, 48, 60, 62, 71, 80, 82, 93, 120, 123, 124, 142, 155, 164, 186, 205, 213, 240, 246, 248, 284, 310, 328, 355, 372, 410, 426, 465, 492, 496, 568, 615, 620, 656, 710, 744, 820, 852, 930, 984, 1065, 1136, 1230, 1240, 1271, 1420, 1488, 1640, 1704, 1860, 1968, 2130, 2201, 2460, 2480, 2542, 2840, 2911, 3280, 3408, 3720, 3813, 4260, 4402, 4920, 5084, 5680, 5822, 6355, 6603, 7440, 7626, 8520, 8733, 8804, 9840, 10168, 11005, 11644, 12710, 13206, 14555, 15252, 17040, 17466, 17608, 19065, 20336, 22010, 23288, 25420, 26412, 29110, 30504, 33015, 34932, 35216, 38130, 43665, 44020, 46576, 50840, 52824, 58220, 61008, 66030, 69864, 76260, 87330, 88040, 90241, 101680, 105648, 116440, 132060, 139728, 152520, 174660, 176080, 180482, 232880, 264120, 270723, 305040, 349320, 360964, 451205, 528240, 541446, 698640, 721928, 902410, 1082892, 1353615, 1443856, 1804820, 2165784, 2707230, 3609640, 4331568, 5414460, 7219280, 10828920, 21657840]

約数ペア:

[(1, 21657840), (2, 10828920), (3, 7219280), (4, 5414460), (5, 4331568), (6, 3609640), (8, 2707230), (10, 2165784), (12, 1804820), (15, 1443856), (16, 1353615), (20, 1082892), (24, 902410), (30, 721928), (31, 698640), (40, 541446), (41, 528240), (48, 451205), (60, 360964), (62, 349320), (71, 305040), (80, 270723), (82, 264120), (93, 232880), (120, 180482), (123, 176080), (124, 174660), (142, 152520), (155, 139728), (164, 132060), (186, 116440), (205, 105648), (213, 101680), (240, 90241), (246, 88040), (248, 87330), (284, 76260), (310, 69864), (328, 66030), (355, 61008), (372, 58220), (410, 52824), (426, 50840), (465, 46576), (492, 44020), (496, 43665), (568, 38130), (615, 35216), (620, 34932), (656, 33015), (710, 30504), (744, 29110), (820, 26412), (852, 25420), (930, 23288), (984, 22010), (1065, 20336), (1136, 19065), (1230, 17608), (1240, 17466), (1271, 17040), (1420, 15252), (1488, 14555), (1640, 13206), (1704, 12710), (1860, 11644), (1968, 11005), (2130, 10168), (2201, 9840), (2460, 8804), (2480, 8733), (2542, 8520), (2840, 7626), (2911, 7440), (3280, 6603), (3408, 6355), (3720, 5822), (3813, 5680), (4260, 5084), (4402, 4920)]