21415920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{181}}^1$

素因数の和:243

約数の個数: 160

約数和(自身を含む): 73120320

約数和(自身を除く): 51704400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 29, 30, 34, 40, 48, 51, 58, 60, 68, 80, 85, 87, 102, 116, 120, 136, 145, 170, 174, 181, 204, 232, 240, 255, 272, 290, 340, 348, 362, 408, 435, 464, 493, 510, 543, 580, 680, 696, 724, 816, 870, 905, 986, 1020, 1086, 1160, 1360, 1392, 1448, 1479, 1740, 1810, 1972, 2040, 2172, 2320, 2465, 2715, 2896, 2958, 3077, 3480, 3620, 3944, 4080, 4344, 4930, 5249, 5430, 5916, 6154, 6960, 7240, 7395, 7888, 8688, 9231, 9860, 10498, 10860, 11832, 12308, 14480, 14790, 15385, 15747, 18462, 19720, 20996, 21720, 23664, 24616, 26245, 29580, 30770, 31494, 36924, 39440, 41992, 43440, 46155, 49232, 52490, 59160, 61540, 62988, 73848, 78735, 83984, 89233, 92310, 104980, 118320, 123080, 125976, 147696, 157470, 178466, 184620, 209960, 246160, 251952, 267699, 314940, 356932, 369240, 419920, 446165, 535398, 629880, 713864, 738480, 892330, 1070796, 1259760, 1338495, 1427728, 1784660, 2141592, 2676990, 3569320, 4283184, 5353980, 7138640, 10707960, 21415920]

約数ペア:

[(1, 21415920), (2, 10707960), (3, 7138640), (4, 5353980), (5, 4283184), (6, 3569320), (8, 2676990), (10, 2141592), (12, 1784660), (15, 1427728), (16, 1338495), (17, 1259760), (20, 1070796), (24, 892330), (29, 738480), (30, 713864), (34, 629880), (40, 535398), (48, 446165), (51, 419920), (58, 369240), (60, 356932), (68, 314940), (80, 267699), (85, 251952), (87, 246160), (102, 209960), (116, 184620), (120, 178466), (136, 157470), (145, 147696), (170, 125976), (174, 123080), (181, 118320), (204, 104980), (232, 92310), (240, 89233), (255, 83984), (272, 78735), (290, 73848), (340, 62988), (348, 61540), (362, 59160), (408, 52490), (435, 49232), (464, 46155), (493, 43440), (510, 41992), (543, 39440), (580, 36924), (680, 31494), (696, 30770), (724, 29580), (816, 26245), (870, 24616), (905, 23664), (986, 21720), (1020, 20996), (1086, 19720), (1160, 18462), (1360, 15747), (1392, 15385), (1448, 14790), (1479, 14480), (1740, 12308), (1810, 11832), (1972, 10860), (2040, 10498), (2172, 9860), (2320, 9231), (2465, 8688), (2715, 7888), (2896, 7395), (2958, 7240), (3077, 6960), (3480, 6154), (3620, 5916), (3944, 5430), (4080, 5249), (4344, 4930)]