21121920

素因数分解:

$2^7\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1$

素因数の和:237

約数の個数: 192

約数和(自身を含む): 77173200

約数和(自身を除く): 56051280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 30, 32, 36, 38, 40, 45, 48, 57, 60, 64, 72, 76, 80, 90, 95, 96, 114, 120, 128, 144, 152, 160, 171, 180, 190, 192, 193, 228, 240, 285, 288, 304, 320, 342, 360, 380, 384, 386, 456, 480, 570, 576, 579, 608, 640, 684, 720, 760, 772, 855, 912, 960, 965, 1140, 1152, 1158, 1216, 1368, 1440, 1520, 1544, 1710, 1737, 1824, 1920, 1930, 2280, 2316, 2432, 2736, 2880, 2895, 3040, 3088, 3420, 3474, 3648, 3667, 3860, 4560, 4632, 5472, 5760, 5790, 6080, 6176, 6840, 6948, 7296, 7334, 7720, 8685, 9120, 9264, 10944, 11001, 11580, 12160, 12352, 13680, 13896, 14668, 15440, 17370, 18240, 18335, 18528, 21888, 22002, 23160, 24704, 27360, 27792, 29336, 30880, 33003, 34740, 36480, 36670, 37056, 44004, 46320, 54720, 55005, 55584, 58672, 61760, 66006, 69480, 73340, 74112, 88008, 92640, 109440, 110010, 111168, 117344, 123520, 132012, 138960, 146680, 165015, 176016, 185280, 220020, 222336, 234688, 264024, 277920, 293360, 330030, 352032, 370560, 440040, 469376, 528048, 555840, 586720, 660060, 704064, 880080, 1056096, 1111680, 1173440, 1320120, 1408128, 1760160, 2112192, 2346880, 2640240, 3520320, 4224384, 5280480, 7040640, 10560960, 21121920]

約数ペア:

[(1, 21121920), (2, 10560960), (3, 7040640), (4, 5280480), (5, 4224384), (6, 3520320), (8, 2640240), (9, 2346880), (10, 2112192), (12, 1760160), (15, 1408128), (16, 1320120), (18, 1173440), (19, 1111680), (20, 1056096), (24, 880080), (30, 704064), (32, 660060), (36, 586720), (38, 555840), (40, 528048), (45, 469376), (48, 440040), (57, 370560), (60, 352032), (64, 330030), (72, 293360), (76, 277920), (80, 264024), (90, 234688), (95, 222336), (96, 220020), (114, 185280), (120, 176016), (128, 165015), (144, 146680), (152, 138960), (160, 132012), (171, 123520), (180, 117344), (190, 111168), (192, 110010), (193, 109440), (228, 92640), (240, 88008), (285, 74112), (288, 73340), (304, 69480), (320, 66006), (342, 61760), (360, 58672), (380, 55584), (384, 55005), (386, 54720), (456, 46320), (480, 44004), (570, 37056), (576, 36670), (579, 36480), (608, 34740), (640, 33003), (684, 30880), (720, 29336), (760, 27792), (772, 27360), (855, 24704), (912, 23160), (960, 22002), (965, 21888), (1140, 18528), (1152, 18335), (1158, 18240), (1216, 17370), (1368, 15440), (1440, 14668), (1520, 13896), (1544, 13680), (1710, 12352), (1737, 12160), (1824, 11580), (1920, 11001), (1930, 10944), (2280, 9264), (2316, 9120), (2432, 8685), (2736, 7720), (2880, 7334), (2895, 7296), (3040, 6948), (3088, 6840), (3420, 6176), (3474, 6080), (3648, 5790), (3667, 5760), (3860, 5472), (4560, 4632)]