21204456

素因数分解:

$2^3\times 3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1$

素因数の和:128

約数の個数: 192

約数和(自身を含む): 70862400

約数和(自身を除く): 49657944

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 13, 14, 19, 21, 24, 26, 28, 38, 39, 42, 49, 52, 56, 57, 73, 76, 78, 84, 91, 98, 104, 114, 133, 146, 147, 152, 156, 168, 182, 196, 219, 228, 247, 266, 273, 292, 294, 312, 364, 392, 399, 438, 456, 494, 511, 532, 546, 584, 588, 637, 728, 741, 798, 876, 931, 949, 988, 1022, 1064, 1092, 1176, 1274, 1387, 1482, 1533, 1596, 1729, 1752, 1862, 1898, 1911, 1976, 2044, 2184, 2548, 2774, 2793, 2847, 2964, 3066, 3192, 3458, 3577, 3724, 3796, 3822, 4088, 4161, 5096, 5187, 5548, 5586, 5694, 5928, 6132, 6643, 6916, 7154, 7448, 7592, 7644, 8322, 9709, 10374, 10731, 11096, 11172, 11388, 12103, 12264, 13286, 13832, 14308, 15288, 16644, 18031, 19418, 19929, 20748, 21462, 22344, 22776, 24206, 26572, 28616, 29127, 33288, 36062, 36309, 38836, 39858, 41496, 42924, 46501, 48412, 53144, 54093, 58254, 67963, 72124, 72618, 77672, 79716, 85848, 93002, 96824, 108186, 116508, 126217, 135926, 139503, 144248, 145236, 159432, 186004, 203889, 216372, 233016, 252434, 271852, 279006, 290472, 372008, 378651, 407778, 432744, 504868, 543704, 558012, 757302, 815556, 883519, 1009736, 1116024, 1514604, 1631112, 1767038, 2650557, 3029208, 3534076, 5301114, 7068152, 10602228, 21204456]

約数ペア:

[(1, 21204456), (2, 10602228), (3, 7068152), (4, 5301114), (6, 3534076), (7, 3029208), (8, 2650557), (12, 1767038), (13, 1631112), (14, 1514604), (19, 1116024), (21, 1009736), (24, 883519), (26, 815556), (28, 757302), (38, 558012), (39, 543704), (42, 504868), (49, 432744), (52, 407778), (56, 378651), (57, 372008), (73, 290472), (76, 279006), (78, 271852), (84, 252434), (91, 233016), (98, 216372), (104, 203889), (114, 186004), (133, 159432), (146, 145236), (147, 144248), (152, 139503), (156, 135926), (168, 126217), (182, 116508), (196, 108186), (219, 96824), (228, 93002), (247, 85848), (266, 79716), (273, 77672), (292, 72618), (294, 72124), (312, 67963), (364, 58254), (392, 54093), (399, 53144), (438, 48412), (456, 46501), (494, 42924), (511, 41496), (532, 39858), (546, 38836), (584, 36309), (588, 36062), (637, 33288), (728, 29127), (741, 28616), (798, 26572), (876, 24206), (931, 22776), (949, 22344), (988, 21462), (1022, 20748), (1064, 19929), (1092, 19418), (1176, 18031), (1274, 16644), (1387, 15288), (1482, 14308), (1533, 13832), (1596, 13286), (1729, 12264), (1752, 12103), (1862, 11388), (1898, 11172), (1911, 11096), (1976, 10731), (2044, 10374), (2184, 9709), (2548, 8322), (2774, 7644), (2793, 7592), (2847, 7448), (2964, 7154), (3066, 6916), (3192, 6643), (3458, 6132), (3577, 5928), (3724, 5694), (3796, 5586), (3822, 5548), (4088, 5187), (4161, 5096)]