20919800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:321

約数の個数: 96

約数和(自身を含む): 54706320

約数和(自身を除く): 33786520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 37, 40, 44, 50, 55, 74, 88, 100, 110, 148, 185, 200, 220, 257, 275, 296, 370, 407, 440, 514, 550, 740, 814, 925, 1028, 1100, 1285, 1480, 1628, 1850, 2035, 2056, 2200, 2570, 2827, 3256, 3700, 4070, 5140, 5654, 6425, 7400, 8140, 9509, 10175, 10280, 11308, 12850, 14135, 16280, 19018, 20350, 22616, 25700, 28270, 38036, 40700, 47545, 51400, 56540, 70675, 76072, 81400, 95090, 104599, 113080, 141350, 190180, 209198, 237725, 282700, 380360, 418396, 475450, 522995, 565400, 836792, 950900, 1045990, 1901800, 2091980, 2614975, 4183960, 5229950, 10459900, 20919800]

約数ペア:

[(1, 20919800), (2, 10459900), (4, 5229950), (5, 4183960), (8, 2614975), (10, 2091980), (11, 1901800), (20, 1045990), (22, 950900), (25, 836792), (37, 565400), (40, 522995), (44, 475450), (50, 418396), (55, 380360), (74, 282700), (88, 237725), (100, 209198), (110, 190180), (148, 141350), (185, 113080), (200, 104599), (220, 95090), (257, 81400), (275, 76072), (296, 70675), (370, 56540), (407, 51400), (440, 47545), (514, 40700), (550, 38036), (740, 28270), (814, 25700), (925, 22616), (1028, 20350), (1100, 19018), (1285, 16280), (1480, 14135), (1628, 12850), (1850, 11308), (2035, 10280), (2056, 10175), (2200, 9509), (2570, 8140), (2827, 7400), (3256, 6425), (3700, 5654), (4070, 5140)]