21508740

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1$

素因数の和:120

約数の個数: 240

約数和(自身を含む): 79035264

約数和(自身を除く): 57526524

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 17, 18, 20, 22, 27, 30, 33, 34, 36, 44, 45, 51, 54, 55, 60, 66, 68, 71, 81, 85, 90, 99, 102, 108, 110, 132, 135, 142, 153, 162, 165, 170, 180, 187, 198, 204, 213, 220, 255, 270, 284, 297, 306, 324, 330, 340, 355, 374, 396, 405, 426, 459, 495, 510, 540, 561, 594, 612, 639, 660, 710, 748, 765, 781, 810, 852, 891, 918, 935, 990, 1020, 1065, 1122, 1188, 1207, 1278, 1377, 1420, 1485, 1530, 1562, 1620, 1683, 1782, 1836, 1870, 1917, 1980, 2130, 2244, 2295, 2343, 2414, 2556, 2754, 2805, 2970, 3060, 3124, 3195, 3366, 3564, 3621, 3740, 3834, 3905, 4260, 4455, 4590, 4686, 4828, 5049, 5508, 5610, 5751, 5940, 6035, 6390, 6732, 6885, 7029, 7242, 7668, 7810, 8415, 8910, 9180, 9372, 9585, 10098, 10863, 11220, 11502, 11715, 12070, 12780, 13277, 13770, 14058, 14484, 15147, 15620, 16830, 17820, 18105, 19170, 20196, 21087, 21726, 23004, 23430, 24140, 25245, 26554, 27540, 28116, 28755, 30294, 32589, 33660, 35145, 36210, 38340, 39831, 42174, 43452, 46860, 50490, 53108, 54315, 57510, 60588, 63261, 65178, 66385, 70290, 72420, 75735, 79662, 84348, 97767, 100980, 105435, 108630, 115020, 119493, 126522, 130356, 132770, 140580, 151470, 159324, 162945, 195534, 199155, 210870, 217260, 238986, 253044, 265540, 302940, 316305, 325890, 358479, 391068, 398310, 421740, 477972, 488835, 597465, 632610, 651780, 716958, 796620, 977670, 1075437, 1194930, 1265220, 1433916, 1792395, 1955340, 2150874, 2389860, 3584790, 4301748, 5377185, 7169580, 10754370, 21508740]

約数ペア:

[(1, 21508740), (2, 10754370), (3, 7169580), (4, 5377185), (5, 4301748), (6, 3584790), (9, 2389860), (10, 2150874), (11, 1955340), (12, 1792395), (15, 1433916), (17, 1265220), (18, 1194930), (20, 1075437), (22, 977670), (27, 796620), (30, 716958), (33, 651780), (34, 632610), (36, 597465), (44, 488835), (45, 477972), (51, 421740), (54, 398310), (55, 391068), (60, 358479), (66, 325890), (68, 316305), (71, 302940), (81, 265540), (85, 253044), (90, 238986), (99, 217260), (102, 210870), (108, 199155), (110, 195534), (132, 162945), (135, 159324), (142, 151470), (153, 140580), (162, 132770), (165, 130356), (170, 126522), (180, 119493), (187, 115020), (198, 108630), (204, 105435), (213, 100980), (220, 97767), (255, 84348), (270, 79662), (284, 75735), (297, 72420), (306, 70290), (324, 66385), (330, 65178), (340, 63261), (355, 60588), (374, 57510), (396, 54315), (405, 53108), (426, 50490), (459, 46860), (495, 43452), (510, 42174), (540, 39831), (561, 38340), (594, 36210), (612, 35145), (639, 33660), (660, 32589), (710, 30294), (748, 28755), (765, 28116), (781, 27540), (810, 26554), (852, 25245), (891, 24140), (918, 23430), (935, 23004), (990, 21726), (1020, 21087), (1065, 20196), (1122, 19170), (1188, 18105), (1207, 17820), (1278, 16830), (1377, 15620), (1420, 15147), (1485, 14484), (1530, 14058), (1562, 13770), (1620, 13277), (1683, 12780), (1782, 12070), (1836, 11715), (1870, 11502), (1917, 11220), (1980, 10863), (2130, 10098), (2244, 9585), (2295, 9372), (2343, 9180), (2414, 8910), (2556, 8415), (2754, 7810), (2805, 7668), (2970, 7242), (3060, 7029), (3124, 6885), (3195, 6732), (3366, 6390), (3564, 6035), (3621, 5940), (3740, 5751), (3834, 5610), (3905, 5508), (4260, 5049), (4455, 4828), (4590, 4686)]