18665920

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{641}}^1$

素因数の和:678

約数の個数: 112

約数和(自身を含む): 54790848

約数和(自身を除く): 36124928

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 64, 65, 70, 80, 91, 104, 112, 130, 140, 160, 182, 208, 224, 260, 280, 320, 364, 416, 448, 455, 520, 560, 641, 728, 832, 910, 1040, 1120, 1282, 1456, 1820, 2080, 2240, 2564, 2912, 3205, 3640, 4160, 4487, 5128, 5824, 6410, 7280, 8333, 8974, 10256, 12820, 14560, 16666, 17948, 20512, 22435, 25640, 29120, 33332, 35896, 41024, 41665, 44870, 51280, 58331, 66664, 71792, 83330, 89740, 102560, 116662, 133328, 143584, 166660, 179480, 205120, 233324, 266656, 287168, 291655, 333320, 358960, 466648, 533312, 583310, 666640, 717920, 933296, 1166620, 1333280, 1435840, 1866592, 2333240, 2666560, 3733184, 4666480, 9332960, 18665920]

約数ペア:

[(1, 18665920), (2, 9332960), (4, 4666480), (5, 3733184), (7, 2666560), (8, 2333240), (10, 1866592), (13, 1435840), (14, 1333280), (16, 1166620), (20, 933296), (26, 717920), (28, 666640), (32, 583310), (35, 533312), (40, 466648), (52, 358960), (56, 333320), (64, 291655), (65, 287168), (70, 266656), (80, 233324), (91, 205120), (104, 179480), (112, 166660), (130, 143584), (140, 133328), (160, 116662), (182, 102560), (208, 89740), (224, 83330), (260, 71792), (280, 66664), (320, 58331), (364, 51280), (416, 44870), (448, 41665), (455, 41024), (520, 35896), (560, 33332), (641, 29120), (728, 25640), (832, 22435), (910, 20512), (1040, 17948), (1120, 16666), (1282, 14560), (1456, 12820), (1820, 10256), (2080, 8974), (2240, 8333), (2564, 7280), (2912, 6410), (3205, 5824), (3640, 5128), (4160, 4487)]