21947520

素因数分解:

$2^7\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:123

約数の個数: 256

約数和(自身を含む): 84602880

約数和(自身を除く): 62655360

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 23, 24, 28, 30, 32, 35, 40, 42, 46, 48, 56, 60, 64, 69, 70, 71, 80, 84, 92, 96, 105, 112, 115, 120, 128, 138, 140, 142, 160, 161, 168, 184, 192, 210, 213, 224, 230, 240, 276, 280, 284, 320, 322, 336, 345, 355, 368, 384, 420, 426, 448, 460, 480, 483, 497, 552, 560, 568, 640, 644, 672, 690, 710, 736, 805, 840, 852, 896, 920, 960, 966, 994, 1065, 1104, 1120, 1136, 1288, 1344, 1380, 1420, 1472, 1491, 1610, 1633, 1680, 1704, 1840, 1920, 1932, 1988, 2130, 2208, 2240, 2272, 2415, 2485, 2576, 2688, 2760, 2840, 2944, 2982, 3220, 3266, 3360, 3408, 3680, 3864, 3976, 4260, 4416, 4480, 4544, 4830, 4899, 4970, 5152, 5520, 5680, 5964, 6440, 6532, 6720, 6816, 7360, 7455, 7728, 7952, 8165, 8520, 8832, 9088, 9660, 9798, 9940, 10304, 11040, 11360, 11431, 11928, 12880, 13064, 13440, 13632, 14720, 14910, 15456, 15904, 16330, 17040, 19320, 19596, 19880, 20608, 22080, 22720, 22862, 23856, 24495, 25760, 26128, 27264, 29820, 30912, 31808, 32660, 34080, 34293, 38640, 39192, 39760, 44160, 45440, 45724, 47712, 48990, 51520, 52256, 57155, 59640, 61824, 63616, 65320, 68160, 68586, 77280, 78384, 79520, 91448, 95424, 97980, 103040, 104512, 114310, 119280, 130640, 136320, 137172, 154560, 156768, 159040, 171465, 182896, 190848, 195960, 209024, 228620, 238560, 261280, 274344, 309120, 313536, 318080, 342930, 365792, 391920, 457240, 477120, 522560, 548688, 627072, 685860, 731584, 783840, 914480, 954240, 1045120, 1097376, 1371720, 1463168, 1567680, 1828960, 2194752, 2743440, 3135360, 3657920, 4389504, 5486880, 7315840, 10973760, 21947520]

約数ペア:

[(1, 21947520), (2, 10973760), (3, 7315840), (4, 5486880), (5, 4389504), (6, 3657920), (7, 3135360), (8, 2743440), (10, 2194752), (12, 1828960), (14, 1567680), (15, 1463168), (16, 1371720), (20, 1097376), (21, 1045120), (23, 954240), (24, 914480), (28, 783840), (30, 731584), (32, 685860), (35, 627072), (40, 548688), (42, 522560), (46, 477120), (48, 457240), (56, 391920), (60, 365792), (64, 342930), (69, 318080), (70, 313536), (71, 309120), (80, 274344), (84, 261280), (92, 238560), (96, 228620), (105, 209024), (112, 195960), (115, 190848), (120, 182896), (128, 171465), (138, 159040), (140, 156768), (142, 154560), (160, 137172), (161, 136320), (168, 130640), (184, 119280), (192, 114310), (210, 104512), (213, 103040), (224, 97980), (230, 95424), (240, 91448), (276, 79520), (280, 78384), (284, 77280), (320, 68586), (322, 68160), (336, 65320), (345, 63616), (355, 61824), (368, 59640), (384, 57155), (420, 52256), (426, 51520), (448, 48990), (460, 47712), (480, 45724), (483, 45440), (497, 44160), (552, 39760), (560, 39192), (568, 38640), (640, 34293), (644, 34080), (672, 32660), (690, 31808), (710, 30912), (736, 29820), (805, 27264), (840, 26128), (852, 25760), (896, 24495), (920, 23856), (960, 22862), (966, 22720), (994, 22080), (1065, 20608), (1104, 19880), (1120, 19596), (1136, 19320), (1288, 17040), (1344, 16330), (1380, 15904), (1420, 15456), (1472, 14910), (1491, 14720), (1610, 13632), (1633, 13440), (1680, 13064), (1704, 12880), (1840, 11928), (1920, 11431), (1932, 11360), (1988, 11040), (2130, 10304), (2208, 9940), (2240, 9798), (2272, 9660), (2415, 9088), (2485, 8832), (2576, 8520), (2688, 8165), (2760, 7952), (2840, 7728), (2944, 7455), (2982, 7360), (3220, 6816), (3266, 6720), (3360, 6532), (3408, 6440), (3680, 5964), (3864, 5680), (3976, 5520), (4260, 5152), (4416, 4970), (4480, 4899), (4544, 4830)]