21291480

素因数分解:

$2^3\times 3^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1$

素因数の和:119

約数の個数: 288

約数和(自身を含む): 86430240

約数和(自身を除く): 65138760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 17, 18, 20, 21, 24, 28, 30, 34, 35, 36, 40, 42, 45, 49, 51, 56, 60, 63, 68, 70, 71, 72, 84, 85, 90, 98, 102, 105, 119, 120, 126, 136, 140, 142, 147, 153, 168, 170, 180, 196, 204, 210, 213, 238, 245, 252, 255, 280, 284, 294, 306, 315, 340, 355, 357, 360, 392, 408, 420, 426, 441, 476, 490, 497, 504, 510, 568, 588, 595, 612, 630, 639, 680, 710, 714, 735, 765, 833, 840, 852, 882, 952, 980, 994, 1020, 1065, 1071, 1176, 1190, 1207, 1224, 1260, 1278, 1420, 1428, 1470, 1491, 1530, 1666, 1704, 1764, 1785, 1960, 1988, 2040, 2130, 2142, 2205, 2380, 2414, 2485, 2499, 2520, 2556, 2840, 2856, 2940, 2982, 3060, 3195, 3332, 3479, 3528, 3570, 3621, 3976, 4165, 4260, 4284, 4410, 4473, 4760, 4828, 4970, 4998, 5112, 5355, 5880, 5964, 6035, 6120, 6390, 6664, 6958, 7140, 7242, 7455, 7497, 8330, 8449, 8520, 8568, 8820, 8946, 9656, 9940, 9996, 10437, 10710, 10863, 11928, 12070, 12495, 12780, 13916, 14280, 14484, 14910, 14994, 16660, 16898, 17395, 17640, 17892, 18105, 19880, 19992, 20874, 21420, 21726, 22365, 24140, 24990, 25347, 25560, 27832, 28968, 29820, 29988, 31311, 33320, 33796, 34790, 35784, 36210, 37485, 41748, 42245, 42840, 43452, 44730, 48280, 49980, 50694, 52185, 54315, 59143, 59640, 59976, 62622, 67592, 69580, 72420, 74970, 76041, 83496, 84490, 86904, 89460, 99960, 101388, 104370, 108630, 118286, 125244, 126735, 139160, 144840, 149940, 152082, 156555, 168980, 177429, 178920, 202776, 208740, 217260, 236572, 250488, 253470, 295715, 299880, 304164, 313110, 337960, 354858, 380205, 417480, 434520, 473144, 506940, 532287, 591430, 608328, 626220, 709716, 760410, 887145, 1013880, 1064574, 1182860, 1252440, 1419432, 1520820, 1774290, 2129148, 2365720, 2661435, 3041640, 3548580, 4258296, 5322870, 7097160, 10645740, 21291480]

約数ペア:

[(1, 21291480), (2, 10645740), (3, 7097160), (4, 5322870), (5, 4258296), (6, 3548580), (7, 3041640), (8, 2661435), (9, 2365720), (10, 2129148), (12, 1774290), (14, 1520820), (15, 1419432), (17, 1252440), (18, 1182860), (20, 1064574), (21, 1013880), (24, 887145), (28, 760410), (30, 709716), (34, 626220), (35, 608328), (36, 591430), (40, 532287), (42, 506940), (45, 473144), (49, 434520), (51, 417480), (56, 380205), (60, 354858), (63, 337960), (68, 313110), (70, 304164), (71, 299880), (72, 295715), (84, 253470), (85, 250488), (90, 236572), (98, 217260), (102, 208740), (105, 202776), (119, 178920), (120, 177429), (126, 168980), (136, 156555), (140, 152082), (142, 149940), (147, 144840), (153, 139160), (168, 126735), (170, 125244), (180, 118286), (196, 108630), (204, 104370), (210, 101388), (213, 99960), (238, 89460), (245, 86904), (252, 84490), (255, 83496), (280, 76041), (284, 74970), (294, 72420), (306, 69580), (315, 67592), (340, 62622), (355, 59976), (357, 59640), (360, 59143), (392, 54315), (408, 52185), (420, 50694), (426, 49980), (441, 48280), (476, 44730), (490, 43452), (497, 42840), (504, 42245), (510, 41748), (568, 37485), (588, 36210), (595, 35784), (612, 34790), (630, 33796), (639, 33320), (680, 31311), (710, 29988), (714, 29820), (735, 28968), (765, 27832), (833, 25560), (840, 25347), (852, 24990), (882, 24140), (952, 22365), (980, 21726), (994, 21420), (1020, 20874), (1065, 19992), (1071, 19880), (1176, 18105), (1190, 17892), (1207, 17640), (1224, 17395), (1260, 16898), (1278, 16660), (1420, 14994), (1428, 14910), (1470, 14484), (1491, 14280), (1530, 13916), (1666, 12780), (1704, 12495), (1764, 12070), (1785, 11928), (1960, 10863), (1988, 10710), (2040, 10437), (2130, 9996), (2142, 9940), (2205, 9656), (2380, 8946), (2414, 8820), (2485, 8568), (2499, 8520), (2520, 8449), (2556, 8330), (2840, 7497), (2856, 7455), (2940, 7242), (2982, 7140), (3060, 6958), (3195, 6664), (3332, 6390), (3479, 6120), (3528, 6035), (3570, 5964), (3621, 5880), (3976, 5355), (4165, 5112), (4260, 4998), (4284, 4970), (4410, 4828), (4473, 4760)]