81115840

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:115

約数の個数: 224

約数和(自身を含む): 233501184

約数和(自身を除く): 152385344

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 31, 32, 34, 37, 40, 52, 62, 64, 65, 68, 74, 80, 85, 104, 124, 130, 136, 148, 155, 160, 170, 185, 208, 221, 248, 260, 272, 296, 310, 320, 340, 370, 403, 416, 442, 481, 496, 520, 527, 544, 592, 620, 629, 680, 740, 806, 832, 884, 962, 992, 1040, 1054, 1088, 1105, 1147, 1184, 1240, 1258, 1360, 1480, 1612, 1768, 1924, 1984, 2015, 2080, 2108, 2210, 2294, 2368, 2405, 2480, 2516, 2635, 2720, 2960, 3145, 3224, 3536, 3848, 4030, 4160, 4216, 4420, 4588, 4810, 4960, 5032, 5270, 5440, 5735, 5920, 6290, 6448, 6851, 7072, 7696, 8060, 8177, 8432, 8840, 9176, 9620, 9920, 10064, 10540, 11470, 11840, 12580, 12896, 13702, 14144, 14911, 15392, 16120, 16354, 16864, 17680, 18352, 19240, 19499, 20128, 21080, 22940, 25160, 25792, 27404, 29822, 30784, 32240, 32708, 33728, 34255, 35360, 36704, 38480, 38998, 40256, 40885, 42160, 45880, 50320, 54808, 59644, 64480, 65416, 68510, 70720, 73408, 74555, 76960, 77996, 81770, 84320, 91760, 97495, 100640, 109616, 119288, 128960, 130832, 137020, 149110, 153920, 155992, 163540, 168640, 183520, 194990, 201280, 219232, 238576, 253487, 261664, 274040, 298220, 311984, 327080, 367040, 389980, 438464, 477152, 506974, 523328, 548080, 596440, 623968, 654160, 779960, 954304, 1013948, 1096160, 1192880, 1247936, 1267435, 1308320, 1559920, 2027896, 2192320, 2385760, 2534870, 2616640, 3119840, 4055792, 4771520, 5069740, 6239680, 8111584, 10139480, 16223168, 20278960, 40557920, 81115840]

約数ペア:

[(1, 81115840), (2, 40557920), (4, 20278960), (5, 16223168), (8, 10139480), (10, 8111584), (13, 6239680), (16, 5069740), (17, 4771520), (20, 4055792), (26, 3119840), (31, 2616640), (32, 2534870), (34, 2385760), (37, 2192320), (40, 2027896), (52, 1559920), (62, 1308320), (64, 1267435), (65, 1247936), (68, 1192880), (74, 1096160), (80, 1013948), (85, 954304), (104, 779960), (124, 654160), (130, 623968), (136, 596440), (148, 548080), (155, 523328), (160, 506974), (170, 477152), (185, 438464), (208, 389980), (221, 367040), (248, 327080), (260, 311984), (272, 298220), (296, 274040), (310, 261664), (320, 253487), (340, 238576), (370, 219232), (403, 201280), (416, 194990), (442, 183520), (481, 168640), (496, 163540), (520, 155992), (527, 153920), (544, 149110), (592, 137020), (620, 130832), (629, 128960), (680, 119288), (740, 109616), (806, 100640), (832, 97495), (884, 91760), (962, 84320), (992, 81770), (1040, 77996), (1054, 76960), (1088, 74555), (1105, 73408), (1147, 70720), (1184, 68510), (1240, 65416), (1258, 64480), (1360, 59644), (1480, 54808), (1612, 50320), (1768, 45880), (1924, 42160), (1984, 40885), (2015, 40256), (2080, 38998), (2108, 38480), (2210, 36704), (2294, 35360), (2368, 34255), (2405, 33728), (2480, 32708), (2516, 32240), (2635, 30784), (2720, 29822), (2960, 27404), (3145, 25792), (3224, 25160), (3536, 22940), (3848, 21080), (4030, 20128), (4160, 19499), (4216, 19240), (4420, 18352), (4588, 17680), (4810, 16864), (4960, 16354), (5032, 16120), (5270, 15392), (5440, 14911), (5735, 14144), (5920, 13702), (6290, 12896), (6448, 12580), (6851, 11840), (7072, 11470), (7696, 10540), (8060, 10064), (8177, 9920), (8432, 9620), (8840, 9176)]