20687940

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1$

素因数の和:459

約数の個数: 192

約数和(自身を含む): 79403520

約数和(自身を除く): 58715580

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 27, 28, 30, 35, 36, 39, 42, 45, 52, 54, 60, 63, 65, 70, 78, 84, 90, 91, 105, 108, 117, 126, 130, 135, 140, 156, 180, 182, 189, 195, 210, 234, 252, 260, 270, 273, 315, 351, 364, 378, 390, 420, 421, 455, 468, 540, 546, 585, 630, 702, 756, 780, 819, 842, 910, 945, 1092, 1170, 1260, 1263, 1365, 1404, 1638, 1684, 1755, 1820, 1890, 2105, 2340, 2457, 2526, 2730, 2947, 3276, 3510, 3780, 3789, 4095, 4210, 4914, 5052, 5460, 5473, 5894, 6315, 7020, 7578, 8190, 8420, 8841, 9828, 10946, 11367, 11788, 12285, 12630, 14735, 15156, 16380, 16419, 17682, 18945, 21892, 22734, 24570, 25260, 26523, 27365, 29470, 32838, 35364, 37890, 38311, 44205, 45468, 49140, 49257, 53046, 54730, 56835, 58940, 65676, 75780, 76622, 79569, 82095, 88410, 98514, 106092, 109460, 113670, 114933, 132615, 147771, 153244, 159138, 164190, 176820, 191555, 197028, 227340, 229866, 246285, 265230, 295542, 318276, 328380, 344799, 383110, 397845, 459732, 492570, 530460, 574665, 591084, 689598, 738855, 766220, 795690, 985140, 1034397, 1149330, 1379196, 1477710, 1591380, 1723995, 2068794, 2298660, 2955420, 3447990, 4137588, 5171985, 6895980, 10343970, 20687940]

約数ペア:

[(1, 20687940), (2, 10343970), (3, 6895980), (4, 5171985), (5, 4137588), (6, 3447990), (7, 2955420), (9, 2298660), (10, 2068794), (12, 1723995), (13, 1591380), (14, 1477710), (15, 1379196), (18, 1149330), (20, 1034397), (21, 985140), (26, 795690), (27, 766220), (28, 738855), (30, 689598), (35, 591084), (36, 574665), (39, 530460), (42, 492570), (45, 459732), (52, 397845), (54, 383110), (60, 344799), (63, 328380), (65, 318276), (70, 295542), (78, 265230), (84, 246285), (90, 229866), (91, 227340), (105, 197028), (108, 191555), (117, 176820), (126, 164190), (130, 159138), (135, 153244), (140, 147771), (156, 132615), (180, 114933), (182, 113670), (189, 109460), (195, 106092), (210, 98514), (234, 88410), (252, 82095), (260, 79569), (270, 76622), (273, 75780), (315, 65676), (351, 58940), (364, 56835), (378, 54730), (390, 53046), (420, 49257), (421, 49140), (455, 45468), (468, 44205), (540, 38311), (546, 37890), (585, 35364), (630, 32838), (702, 29470), (756, 27365), (780, 26523), (819, 25260), (842, 24570), (910, 22734), (945, 21892), (1092, 18945), (1170, 17682), (1260, 16419), (1263, 16380), (1365, 15156), (1404, 14735), (1638, 12630), (1684, 12285), (1755, 11788), (1820, 11367), (1890, 10946), (2105, 9828), (2340, 8841), (2457, 8420), (2526, 8190), (2730, 7578), (2947, 7020), (3276, 6315), (3510, 5894), (3780, 5473), (3789, 5460), (4095, 5052), (4210, 4914)]