21391440

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{107}}^1$

素因数の和:154

約数の個数: 240

約数和(自身を含む): 82441152

約数和(自身を除く): 61049712

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 48, 49, 51, 56, 60, 68, 70, 80, 84, 85, 98, 102, 105, 107, 112, 119, 120, 136, 140, 147, 168, 170, 196, 204, 210, 214, 238, 240, 245, 255, 272, 280, 294, 321, 336, 340, 357, 392, 408, 420, 428, 476, 490, 510, 535, 560, 588, 595, 642, 680, 714, 735, 749, 784, 816, 833, 840, 856, 952, 980, 1020, 1070, 1176, 1190, 1284, 1360, 1428, 1470, 1498, 1605, 1666, 1680, 1712, 1785, 1819, 1904, 1960, 2040, 2140, 2247, 2352, 2380, 2499, 2568, 2856, 2940, 2996, 3210, 3332, 3570, 3638, 3745, 3920, 4080, 4165, 4280, 4494, 4760, 4998, 5136, 5243, 5457, 5712, 5880, 5992, 6420, 6664, 7140, 7276, 7490, 8330, 8560, 8988, 9095, 9520, 9996, 10486, 10914, 11235, 11760, 11984, 12495, 12733, 12840, 13328, 14280, 14552, 14980, 15729, 16660, 17976, 18190, 19992, 20972, 21828, 22470, 24990, 25466, 25680, 26215, 27285, 28560, 29104, 29960, 31458, 33320, 35952, 36380, 38199, 39984, 41944, 43656, 44940, 49980, 50932, 52430, 54570, 59920, 62916, 63665, 66640, 72760, 76398, 78645, 83888, 87312, 89131, 89880, 99960, 101864, 104860, 109140, 125832, 127330, 145520, 152796, 157290, 178262, 179760, 190995, 199920, 203728, 209720, 218280, 251664, 254660, 267393, 305592, 314580, 356524, 381990, 419440, 436560, 445655, 509320, 534786, 611184, 629160, 713048, 763980, 891310, 1018640, 1069572, 1258320, 1336965, 1426096, 1527960, 1782620, 2139144, 2673930, 3055920, 3565240, 4278288, 5347860, 7130480, 10695720, 21391440]

約数ペア:

[(1, 21391440), (2, 10695720), (3, 7130480), (4, 5347860), (5, 4278288), (6, 3565240), (7, 3055920), (8, 2673930), (10, 2139144), (12, 1782620), (14, 1527960), (15, 1426096), (16, 1336965), (17, 1258320), (20, 1069572), (21, 1018640), (24, 891310), (28, 763980), (30, 713048), (34, 629160), (35, 611184), (40, 534786), (42, 509320), (48, 445655), (49, 436560), (51, 419440), (56, 381990), (60, 356524), (68, 314580), (70, 305592), (80, 267393), (84, 254660), (85, 251664), (98, 218280), (102, 209720), (105, 203728), (107, 199920), (112, 190995), (119, 179760), (120, 178262), (136, 157290), (140, 152796), (147, 145520), (168, 127330), (170, 125832), (196, 109140), (204, 104860), (210, 101864), (214, 99960), (238, 89880), (240, 89131), (245, 87312), (255, 83888), (272, 78645), (280, 76398), (294, 72760), (321, 66640), (336, 63665), (340, 62916), (357, 59920), (392, 54570), (408, 52430), (420, 50932), (428, 49980), (476, 44940), (490, 43656), (510, 41944), (535, 39984), (560, 38199), (588, 36380), (595, 35952), (642, 33320), (680, 31458), (714, 29960), (735, 29104), (749, 28560), (784, 27285), (816, 26215), (833, 25680), (840, 25466), (856, 24990), (952, 22470), (980, 21828), (1020, 20972), (1070, 19992), (1176, 18190), (1190, 17976), (1284, 16660), (1360, 15729), (1428, 14980), (1470, 14552), (1498, 14280), (1605, 13328), (1666, 12840), (1680, 12733), (1712, 12495), (1785, 11984), (1819, 11760), (1904, 11235), (1960, 10914), (2040, 10486), (2140, 9996), (2247, 9520), (2352, 9095), (2380, 8988), (2499, 8560), (2568, 8330), (2856, 7490), (2940, 7276), (2996, 7140), (3210, 6664), (3332, 6420), (3570, 5992), (3638, 5880), (3745, 5712), (3920, 5457), (4080, 5243), (4165, 5136), (4280, 4998), (4494, 4760)]