257921820

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{331}}^1$

素因数の和:402

約数の個数: 240

約数和(自身を含む): 897603168

約数和(自身を除く): 639681348

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 37, 39, 45, 52, 54, 60, 65, 74, 78, 81, 90, 108, 111, 117, 130, 135, 148, 156, 162, 180, 185, 195, 222, 234, 260, 270, 324, 331, 333, 351, 370, 390, 405, 444, 468, 481, 540, 555, 585, 662, 666, 702, 740, 780, 810, 962, 993, 999, 1053, 1110, 1170, 1324, 1332, 1404, 1443, 1620, 1655, 1665, 1755, 1924, 1986, 1998, 2106, 2220, 2340, 2405, 2886, 2979, 2997, 3310, 3330, 3510, 3972, 3996, 4212, 4303, 4329, 4810, 4965, 4995, 5265, 5772, 5958, 5994, 6620, 6660, 7020, 7215, 8606, 8658, 8937, 9620, 9930, 9990, 10530, 11916, 11988, 12247, 12909, 12987, 14430, 14895, 14985, 17212, 17316, 17874, 19860, 19980, 21060, 21515, 21645, 24494, 25818, 25974, 26811, 28860, 29790, 29970, 35748, 36741, 38727, 38961, 43030, 43290, 44685, 48988, 51636, 51948, 53622, 59580, 59940, 61235, 64545, 64935, 73482, 77454, 77922, 86060, 86580, 89370, 107244, 110223, 116181, 122470, 129090, 129870, 134055, 146964, 154908, 155844, 159211, 178740, 183705, 193635, 194805, 220446, 232362, 244940, 258180, 259740, 268110, 318422, 330669, 348543, 367410, 387270, 389610, 440892, 464724, 477633, 536220, 551115, 580905, 636844, 661338, 697086, 734820, 774540, 779220, 796055, 955266, 992007, 1102230, 1161810, 1322676, 1394172, 1432899, 1592110, 1653345, 1742715, 1910532, 1984014, 2204460, 2323620, 2388165, 2865798, 3184220, 3306690, 3485430, 3968028, 4298697, 4776330, 4960035, 5731596, 6613380, 6970860, 7164495, 8597394, 9552660, 9920070, 12896091, 14328990, 17194788, 19840140, 21493485, 25792182, 28657980, 42986970, 51584364, 64480455, 85973940, 128960910, 257921820]

約数ペア:

[(1, 257921820), (2, 128960910), (3, 85973940), (4, 64480455), (5, 51584364), (6, 42986970), (9, 28657980), (10, 25792182), (12, 21493485), (13, 19840140), (15, 17194788), (18, 14328990), (20, 12896091), (26, 9920070), (27, 9552660), (30, 8597394), (36, 7164495), (37, 6970860), (39, 6613380), (45, 5731596), (52, 4960035), (54, 4776330), (60, 4298697), (65, 3968028), (74, 3485430), (78, 3306690), (81, 3184220), (90, 2865798), (108, 2388165), (111, 2323620), (117, 2204460), (130, 1984014), (135, 1910532), (148, 1742715), (156, 1653345), (162, 1592110), (180, 1432899), (185, 1394172), (195, 1322676), (222, 1161810), (234, 1102230), (260, 992007), (270, 955266), (324, 796055), (331, 779220), (333, 774540), (351, 734820), (370, 697086), (390, 661338), (405, 636844), (444, 580905), (468, 551115), (481, 536220), (540, 477633), (555, 464724), (585, 440892), (662, 389610), (666, 387270), (702, 367410), (740, 348543), (780, 330669), (810, 318422), (962, 268110), (993, 259740), (999, 258180), (1053, 244940), (1110, 232362), (1170, 220446), (1324, 194805), (1332, 193635), (1404, 183705), (1443, 178740), (1620, 159211), (1655, 155844), (1665, 154908), (1755, 146964), (1924, 134055), (1986, 129870), (1998, 129090), (2106, 122470), (2220, 116181), (2340, 110223), (2405, 107244), (2886, 89370), (2979, 86580), (2997, 86060), (3310, 77922), (3330, 77454), (3510, 73482), (3972, 64935), (3996, 64545), (4212, 61235), (4303, 59940), (4329, 59580), (4810, 53622), (4965, 51948), (4995, 51636), (5265, 48988), (5772, 44685), (5958, 43290), (5994, 43030), (6620, 38961), (6660, 38727), (7020, 36741), (7215, 35748), (8606, 29970), (8658, 29790), (8937, 28860), (9620, 26811), (9930, 25974), (9990, 25818), (10530, 24494), (11916, 21645), (11988, 21515), (12247, 21060), (12909, 19980), (12987, 19860), (14430, 17874), (14895, 17316), (14985, 17212)]