1991379840

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{617}}^1$

素因数の和:721

約数の個数: 192

約数和(自身を含む): 6516661680

約数和(自身を除く): 4525281840

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 41, 48, 60, 64, 80, 82, 96, 120, 123, 128, 160, 164, 192, 205, 240, 246, 320, 328, 384, 410, 480, 492, 615, 617, 640, 656, 820, 960, 984, 1230, 1234, 1312, 1640, 1681, 1851, 1920, 1968, 2460, 2468, 2624, 3085, 3280, 3362, 3702, 3936, 4920, 4936, 5043, 5248, 6170, 6560, 6724, 7404, 7872, 8405, 9255, 9840, 9872, 10086, 12340, 13120, 13448, 14808, 15744, 16810, 18510, 19680, 19744, 20172, 24680, 25215, 25297, 26240, 26896, 29616, 33620, 37020, 39360, 39488, 40344, 49360, 50430, 50594, 53792, 59232, 67240, 74040, 75891, 78720, 78976, 80688, 98720, 100860, 101188, 107584, 118464, 126485, 134480, 148080, 151782, 161376, 197440, 201720, 202376, 215168, 236928, 252970, 268960, 296160, 303564, 322752, 379455, 394880, 403440, 404752, 505940, 537920, 592320, 607128, 645504, 758910, 806880, 809504, 1011880, 1037177, 1075840, 1184640, 1214256, 1517820, 1613760, 1619008, 2023760, 2074354, 2428512, 3035640, 3111531, 3227520, 3238016, 4047520, 4148708, 4857024, 5185885, 6071280, 6223062, 8095040, 8297416, 9714048, 10371770, 12142560, 12446124, 15557655, 16190080, 16594832, 20743540, 24285120, 24892248, 31115310, 33189664, 41487080, 48570240, 49784496, 62230620, 66379328, 82974160, 99568992, 124461240, 132758656, 165948320, 199137984, 248922480, 331896640, 398275968, 497844960, 663793280, 995689920, 1991379840]

約数ペア:

[(1, 1991379840), (2, 995689920), (3, 663793280), (4, 497844960), (5, 398275968), (6, 331896640), (8, 248922480), (10, 199137984), (12, 165948320), (15, 132758656), (16, 124461240), (20, 99568992), (24, 82974160), (30, 66379328), (32, 62230620), (40, 49784496), (41, 48570240), (48, 41487080), (60, 33189664), (64, 31115310), (80, 24892248), (82, 24285120), (96, 20743540), (120, 16594832), (123, 16190080), (128, 15557655), (160, 12446124), (164, 12142560), (192, 10371770), (205, 9714048), (240, 8297416), (246, 8095040), (320, 6223062), (328, 6071280), (384, 5185885), (410, 4857024), (480, 4148708), (492, 4047520), (615, 3238016), (617, 3227520), (640, 3111531), (656, 3035640), (820, 2428512), (960, 2074354), (984, 2023760), (1230, 1619008), (1234, 1613760), (1312, 1517820), (1640, 1214256), (1681, 1184640), (1851, 1075840), (1920, 1037177), (1968, 1011880), (2460, 809504), (2468, 806880), (2624, 758910), (3085, 645504), (3280, 607128), (3362, 592320), (3702, 537920), (3936, 505940), (4920, 404752), (4936, 403440), (5043, 394880), (5248, 379455), (6170, 322752), (6560, 303564), (6724, 296160), (7404, 268960), (7872, 252970), (8405, 236928), (9255, 215168), (9840, 202376), (9872, 201720), (10086, 197440), (12340, 161376), (13120, 151782), (13448, 148080), (14808, 134480), (15744, 126485), (16810, 118464), (18510, 107584), (19680, 101188), (19744, 100860), (20172, 98720), (24680, 80688), (25215, 78976), (25297, 78720), (26240, 75891), (26896, 74040), (29616, 67240), (33620, 59232), (37020, 53792), (39360, 50594), (39488, 50430), (40344, 49360)]