21828240

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:158

約数の個数: 240

約数和(自身を含む): 86351616

約数和(自身を除く): 64523376

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 61, 63, 70, 71, 72, 80, 84, 90, 105, 112, 120, 122, 126, 140, 142, 144, 168, 180, 183, 210, 213, 240, 244, 252, 280, 284, 305, 315, 336, 355, 360, 366, 420, 426, 427, 488, 497, 504, 549, 560, 568, 610, 630, 639, 710, 720, 732, 840, 852, 854, 915, 976, 994, 1008, 1065, 1098, 1136, 1220, 1260, 1278, 1281, 1420, 1464, 1491, 1680, 1704, 1708, 1830, 1988, 2130, 2135, 2196, 2440, 2485, 2520, 2556, 2562, 2745, 2840, 2928, 2982, 3195, 3408, 3416, 3660, 3843, 3976, 4260, 4270, 4331, 4392, 4473, 4880, 4970, 5040, 5112, 5124, 5490, 5680, 5964, 6390, 6405, 6832, 7320, 7455, 7686, 7952, 8520, 8540, 8662, 8784, 8946, 9940, 10224, 10248, 10980, 11928, 12780, 12810, 12993, 14640, 14910, 15372, 17040, 17080, 17324, 17892, 19215, 19880, 20496, 21655, 21960, 22365, 23856, 25560, 25620, 25986, 29820, 30317, 30744, 34160, 34648, 35784, 38430, 38979, 39760, 43310, 43920, 44730, 51120, 51240, 51972, 59640, 60634, 61488, 64965, 69296, 71568, 76860, 77958, 86620, 89460, 90951, 102480, 103944, 119280, 121268, 129930, 151585, 153720, 155916, 173240, 178920, 181902, 194895, 207888, 242536, 259860, 272853, 303170, 307440, 311832, 346480, 357840, 363804, 389790, 454755, 485072, 519720, 545706, 606340, 623664, 727608, 779580, 909510, 1039440, 1091412, 1212680, 1364265, 1455216, 1559160, 1819020, 2182824, 2425360, 2728530, 3118320, 3638040, 4365648, 5457060, 7276080, 10914120, 21828240]

約数ペア:

[(1, 21828240), (2, 10914120), (3, 7276080), (4, 5457060), (5, 4365648), (6, 3638040), (7, 3118320), (8, 2728530), (9, 2425360), (10, 2182824), (12, 1819020), (14, 1559160), (15, 1455216), (16, 1364265), (18, 1212680), (20, 1091412), (21, 1039440), (24, 909510), (28, 779580), (30, 727608), (35, 623664), (36, 606340), (40, 545706), (42, 519720), (45, 485072), (48, 454755), (56, 389790), (60, 363804), (61, 357840), (63, 346480), (70, 311832), (71, 307440), (72, 303170), (80, 272853), (84, 259860), (90, 242536), (105, 207888), (112, 194895), (120, 181902), (122, 178920), (126, 173240), (140, 155916), (142, 153720), (144, 151585), (168, 129930), (180, 121268), (183, 119280), (210, 103944), (213, 102480), (240, 90951), (244, 89460), (252, 86620), (280, 77958), (284, 76860), (305, 71568), (315, 69296), (336, 64965), (355, 61488), (360, 60634), (366, 59640), (420, 51972), (426, 51240), (427, 51120), (488, 44730), (497, 43920), (504, 43310), (549, 39760), (560, 38979), (568, 38430), (610, 35784), (630, 34648), (639, 34160), (710, 30744), (720, 30317), (732, 29820), (840, 25986), (852, 25620), (854, 25560), (915, 23856), (976, 22365), (994, 21960), (1008, 21655), (1065, 20496), (1098, 19880), (1136, 19215), (1220, 17892), (1260, 17324), (1278, 17080), (1281, 17040), (1420, 15372), (1464, 14910), (1491, 14640), (1680, 12993), (1704, 12810), (1708, 12780), (1830, 11928), (1988, 10980), (2130, 10248), (2135, 10224), (2196, 9940), (2440, 8946), (2485, 8784), (2520, 8662), (2556, 8540), (2562, 8520), (2745, 7952), (2840, 7686), (2928, 7455), (2982, 7320), (3195, 6832), (3408, 6405), (3416, 6390), (3660, 5964), (3843, 5680), (3976, 5490), (4260, 5124), (4270, 5112), (4331, 5040), (4392, 4970), (4473, 4880)]