81322920

素因数分解:

$2^3\times 3^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{347}}^1$

素因数の和:405

約数の個数: 256

約数和(自身を含む): 320716800

約数和(自身を除く): 239393880

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 31, 35, 36, 40, 42, 45, 54, 56, 60, 62, 63, 70, 72, 84, 90, 93, 105, 108, 120, 124, 126, 135, 140, 155, 168, 180, 186, 189, 210, 216, 217, 248, 252, 270, 279, 280, 310, 315, 347, 360, 372, 378, 420, 434, 465, 504, 540, 558, 620, 630, 651, 694, 744, 756, 837, 840, 868, 930, 945, 1041, 1080, 1085, 1116, 1240, 1260, 1302, 1388, 1395, 1512, 1674, 1735, 1736, 1860, 1890, 1953, 2082, 2170, 2232, 2429, 2520, 2604, 2776, 2790, 3123, 3255, 3348, 3470, 3720, 3780, 3906, 4164, 4185, 4340, 4858, 5205, 5208, 5580, 5859, 6246, 6510, 6696, 6940, 7287, 7560, 7812, 8328, 8370, 8680, 9369, 9716, 9765, 10410, 10757, 11160, 11718, 12145, 12492, 13020, 13880, 14574, 15615, 15624, 16740, 18738, 19432, 19530, 20820, 21514, 21861, 23436, 24290, 24984, 26040, 29148, 29295, 31230, 32271, 33480, 36435, 37476, 39060, 41640, 43028, 43722, 46845, 46872, 48580, 53785, 58296, 58590, 62460, 64542, 65583, 72870, 74952, 75299, 78120, 86056, 87444, 93690, 96813, 97160, 107570, 109305, 117180, 124920, 129084, 131166, 145740, 150598, 161355, 174888, 187380, 193626, 215140, 218610, 225897, 234360, 258168, 262332, 290439, 291480, 301196, 322710, 327915, 374760, 376495, 387252, 430280, 437220, 451794, 484065, 524664, 580878, 602392, 645420, 655830, 677691, 752990, 774504, 874440, 903588, 968130, 1129485, 1161756, 1290840, 1311660, 1355382, 1452195, 1505980, 1807176, 1936260, 2033073, 2258970, 2323512, 2623320, 2710764, 2904390, 3011960, 3388455, 3872520, 4066146, 4517940, 5421528, 5808780, 6776910, 8132292, 9035880, 10165365, 11617560, 13553820, 16264584, 20330730, 27107640, 40661460, 81322920]

約数ペア:

[(1, 81322920), (2, 40661460), (3, 27107640), (4, 20330730), (5, 16264584), (6, 13553820), (7, 11617560), (8, 10165365), (9, 9035880), (10, 8132292), (12, 6776910), (14, 5808780), (15, 5421528), (18, 4517940), (20, 4066146), (21, 3872520), (24, 3388455), (27, 3011960), (28, 2904390), (30, 2710764), (31, 2623320), (35, 2323512), (36, 2258970), (40, 2033073), (42, 1936260), (45, 1807176), (54, 1505980), (56, 1452195), (60, 1355382), (62, 1311660), (63, 1290840), (70, 1161756), (72, 1129485), (84, 968130), (90, 903588), (93, 874440), (105, 774504), (108, 752990), (120, 677691), (124, 655830), (126, 645420), (135, 602392), (140, 580878), (155, 524664), (168, 484065), (180, 451794), (186, 437220), (189, 430280), (210, 387252), (216, 376495), (217, 374760), (248, 327915), (252, 322710), (270, 301196), (279, 291480), (280, 290439), (310, 262332), (315, 258168), (347, 234360), (360, 225897), (372, 218610), (378, 215140), (420, 193626), (434, 187380), (465, 174888), (504, 161355), (540, 150598), (558, 145740), (620, 131166), (630, 129084), (651, 124920), (694, 117180), (744, 109305), (756, 107570), (837, 97160), (840, 96813), (868, 93690), (930, 87444), (945, 86056), (1041, 78120), (1080, 75299), (1085, 74952), (1116, 72870), (1240, 65583), (1260, 64542), (1302, 62460), (1388, 58590), (1395, 58296), (1512, 53785), (1674, 48580), (1735, 46872), (1736, 46845), (1860, 43722), (1890, 43028), (1953, 41640), (2082, 39060), (2170, 37476), (2232, 36435), (2429, 33480), (2520, 32271), (2604, 31230), (2776, 29295), (2790, 29148), (3123, 26040), (3255, 24984), (3348, 24290), (3470, 23436), (3720, 21861), (3780, 21514), (3906, 20820), (4164, 19530), (4185, 19432), (4340, 18738), (4858, 16740), (5205, 15624), (5208, 15615), (5580, 14574), (5859, 13880), (6246, 13020), (6510, 12492), (6696, 12145), (6940, 11718), (7287, 11160), (7560, 10757), (7812, 10410), (8328, 9765), (8370, 9716), (8680, 9369)]