21759920

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{61}}^1$

素因数の和:108

約数の個数: 160

約数和(自身を含む): 64579200

約数和(自身を除く): 42819280

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 49, 52, 56, 61, 65, 70, 80, 91, 98, 104, 112, 122, 130, 140, 182, 196, 208, 244, 245, 260, 280, 305, 343, 364, 392, 427, 455, 488, 490, 520, 560, 610, 637, 686, 728, 784, 793, 854, 910, 976, 980, 1040, 1220, 1274, 1372, 1456, 1586, 1708, 1715, 1820, 1960, 2135, 2440, 2548, 2744, 2989, 3172, 3185, 3416, 3430, 3640, 3920, 3965, 4270, 4459, 4880, 5096, 5488, 5551, 5978, 6344, 6370, 6832, 6860, 7280, 7930, 8540, 8918, 10192, 11102, 11956, 12688, 12740, 13720, 14945, 15860, 17080, 17836, 20923, 22204, 22295, 23912, 25480, 27440, 27755, 29890, 31720, 34160, 35672, 38857, 41846, 44408, 44590, 47824, 50960, 55510, 59780, 63440, 71344, 77714, 83692, 88816, 89180, 104615, 111020, 119560, 155428, 167384, 178360, 194285, 209230, 222040, 239120, 271999, 310856, 334768, 356720, 388570, 418460, 444080, 543998, 621712, 777140, 836920, 1087996, 1359995, 1554280, 1673840, 2175992, 2719990, 3108560, 4351984, 5439980, 10879960, 21759920]

約数ペア:

[(1, 21759920), (2, 10879960), (4, 5439980), (5, 4351984), (7, 3108560), (8, 2719990), (10, 2175992), (13, 1673840), (14, 1554280), (16, 1359995), (20, 1087996), (26, 836920), (28, 777140), (35, 621712), (40, 543998), (49, 444080), (52, 418460), (56, 388570), (61, 356720), (65, 334768), (70, 310856), (80, 271999), (91, 239120), (98, 222040), (104, 209230), (112, 194285), (122, 178360), (130, 167384), (140, 155428), (182, 119560), (196, 111020), (208, 104615), (244, 89180), (245, 88816), (260, 83692), (280, 77714), (305, 71344), (343, 63440), (364, 59780), (392, 55510), (427, 50960), (455, 47824), (488, 44590), (490, 44408), (520, 41846), (560, 38857), (610, 35672), (637, 34160), (686, 31720), (728, 29890), (784, 27755), (793, 27440), (854, 25480), (910, 23912), (976, 22295), (980, 22204), (1040, 20923), (1220, 17836), (1274, 17080), (1372, 15860), (1456, 14945), (1586, 13720), (1708, 12740), (1715, 12688), (1820, 11956), (1960, 11102), (2135, 10192), (2440, 8918), (2548, 8540), (2744, 7930), (2989, 7280), (3172, 6860), (3185, 6832), (3416, 6370), (3430, 6344), (3640, 5978), (3920, 5551), (3965, 5488), (4270, 5096), (4459, 4880)]