20981376

素因数分解:

$2^7\times 3^3\times {\mathrm{13}}^1\times {\mathrm{467}}^1$

素因数の和:503

約数の個数: 128

約数和(自身を含む): 66830400

約数和(自身を除く): 45849024

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 27, 32, 36, 39, 48, 52, 54, 64, 72, 78, 96, 104, 108, 117, 128, 144, 156, 192, 208, 216, 234, 288, 312, 351, 384, 416, 432, 467, 468, 576, 624, 702, 832, 864, 934, 936, 1152, 1248, 1401, 1404, 1664, 1728, 1868, 1872, 2496, 2802, 2808, 3456, 3736, 3744, 4203, 4992, 5604, 5616, 6071, 7472, 7488, 8406, 11208, 11232, 12142, 12609, 14944, 14976, 16812, 18213, 22416, 22464, 24284, 25218, 29888, 33624, 36426, 44832, 44928, 48568, 50436, 54639, 59776, 67248, 72852, 89664, 97136, 100872, 109278, 134496, 145704, 163917, 179328, 194272, 201744, 218556, 268992, 291408, 327834, 388544, 403488, 437112, 537984, 582816, 655668, 777088, 806976, 874224, 1165632, 1311336, 1613952, 1748448, 2331264, 2622672, 3496896, 5245344, 6993792, 10490688, 20981376]

約数ペア:

[(1, 20981376), (2, 10490688), (3, 6993792), (4, 5245344), (6, 3496896), (8, 2622672), (9, 2331264), (12, 1748448), (13, 1613952), (16, 1311336), (18, 1165632), (24, 874224), (26, 806976), (27, 777088), (32, 655668), (36, 582816), (39, 537984), (48, 437112), (52, 403488), (54, 388544), (64, 327834), (72, 291408), (78, 268992), (96, 218556), (104, 201744), (108, 194272), (117, 179328), (128, 163917), (144, 145704), (156, 134496), (192, 109278), (208, 100872), (216, 97136), (234, 89664), (288, 72852), (312, 67248), (351, 59776), (384, 54639), (416, 50436), (432, 48568), (467, 44928), (468, 44832), (576, 36426), (624, 33624), (702, 29888), (832, 25218), (864, 24284), (934, 22464), (936, 22416), (1152, 18213), (1248, 16812), (1401, 14976), (1404, 14944), (1664, 12609), (1728, 12142), (1868, 11232), (1872, 11208), (2496, 8406), (2802, 7488), (2808, 7472), (3456, 6071), (3736, 5616), (3744, 5604), (4203, 4992)]