81401040

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{521}}^1$

素因数の和:578

約数の個数: 240

約数和(自身を含む): 323122176

約数和(自身を除く): 241721136

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 31, 35, 36, 40, 42, 45, 48, 56, 60, 62, 63, 70, 72, 80, 84, 90, 93, 105, 112, 120, 124, 126, 140, 144, 155, 168, 180, 186, 210, 217, 240, 248, 252, 279, 280, 310, 315, 336, 360, 372, 420, 434, 465, 496, 504, 521, 558, 560, 620, 630, 651, 720, 744, 840, 868, 930, 1008, 1042, 1085, 1116, 1240, 1260, 1302, 1395, 1488, 1563, 1680, 1736, 1860, 1953, 2084, 2170, 2232, 2480, 2520, 2604, 2605, 2790, 3126, 3255, 3472, 3647, 3720, 3906, 4168, 4340, 4464, 4689, 5040, 5208, 5210, 5580, 6252, 6510, 7294, 7440, 7812, 7815, 8336, 8680, 9378, 9765, 10416, 10420, 10941, 11160, 12504, 13020, 14588, 15624, 15630, 16151, 17360, 18235, 18756, 19530, 20840, 21882, 22320, 23445, 25008, 26040, 29176, 31248, 31260, 32302, 32823, 36470, 37512, 39060, 41680, 43764, 46890, 48453, 52080, 54705, 58352, 62520, 64604, 65646, 72940, 75024, 78120, 80755, 87528, 93780, 96906, 109410, 113057, 125040, 129208, 131292, 145359, 145880, 156240, 161510, 164115, 175056, 187560, 193812, 218820, 226114, 242265, 258416, 262584, 290718, 291760, 323020, 328230, 339171, 375120, 387624, 437640, 452228, 484530, 525168, 565285, 581436, 646040, 656460, 678342, 726795, 775248, 875280, 904456, 969060, 1017513, 1130570, 1162872, 1292080, 1312920, 1356684, 1453590, 1695855, 1808912, 1938120, 2035026, 2261140, 2325744, 2625840, 2713368, 2907180, 3391710, 3876240, 4070052, 4522280, 5087565, 5426736, 5814360, 6783420, 8140104, 9044560, 10175130, 11628720, 13566840, 16280208, 20350260, 27133680, 40700520, 81401040]

約数ペア:

[(1, 81401040), (2, 40700520), (3, 27133680), (4, 20350260), (5, 16280208), (6, 13566840), (7, 11628720), (8, 10175130), (9, 9044560), (10, 8140104), (12, 6783420), (14, 5814360), (15, 5426736), (16, 5087565), (18, 4522280), (20, 4070052), (21, 3876240), (24, 3391710), (28, 2907180), (30, 2713368), (31, 2625840), (35, 2325744), (36, 2261140), (40, 2035026), (42, 1938120), (45, 1808912), (48, 1695855), (56, 1453590), (60, 1356684), (62, 1312920), (63, 1292080), (70, 1162872), (72, 1130570), (80, 1017513), (84, 969060), (90, 904456), (93, 875280), (105, 775248), (112, 726795), (120, 678342), (124, 656460), (126, 646040), (140, 581436), (144, 565285), (155, 525168), (168, 484530), (180, 452228), (186, 437640), (210, 387624), (217, 375120), (240, 339171), (248, 328230), (252, 323020), (279, 291760), (280, 290718), (310, 262584), (315, 258416), (336, 242265), (360, 226114), (372, 218820), (420, 193812), (434, 187560), (465, 175056), (496, 164115), (504, 161510), (521, 156240), (558, 145880), (560, 145359), (620, 131292), (630, 129208), (651, 125040), (720, 113057), (744, 109410), (840, 96906), (868, 93780), (930, 87528), (1008, 80755), (1042, 78120), (1085, 75024), (1116, 72940), (1240, 65646), (1260, 64604), (1302, 62520), (1395, 58352), (1488, 54705), (1563, 52080), (1680, 48453), (1736, 46890), (1860, 43764), (1953, 41680), (2084, 39060), (2170, 37512), (2232, 36470), (2480, 32823), (2520, 32302), (2604, 31260), (2605, 31248), (2790, 29176), (3126, 26040), (3255, 25008), (3472, 23445), (3647, 22320), (3720, 21882), (3906, 20840), (4168, 19530), (4340, 18756), (4464, 18235), (4689, 17360), (5040, 16151), (5208, 15630), (5210, 15624), (5580, 14588), (6252, 13020), (6510, 12504), (7294, 11160), (7440, 10941), (7812, 10420), (7815, 10416), (8336, 9765), (8680, 9378)]