20658440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1619}}^1$

素因数の和:1670

約数の個数: 64

約数和(自身を含む): 52488000

約数和(自身を除く): 31829560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1619, 2552, 3190, 3238, 6380, 6476, 8095, 12760, 12952, 16190, 17809, 32380, 35618, 46951, 64760, 71236, 89045, 93902, 142472, 178090, 187804, 234755, 356180, 375608, 469510, 516461, 712360, 939020, 1032922, 1878040, 2065844, 2582305, 4131688, 5164610, 10329220, 20658440]

約数ペア:

[(1, 20658440), (2, 10329220), (4, 5164610), (5, 4131688), (8, 2582305), (10, 2065844), (11, 1878040), (20, 1032922), (22, 939020), (29, 712360), (40, 516461), (44, 469510), (55, 375608), (58, 356180), (88, 234755), (110, 187804), (116, 178090), (145, 142472), (220, 93902), (232, 89045), (290, 71236), (319, 64760), (440, 46951), (580, 35618), (638, 32380), (1160, 17809), (1276, 16190), (1595, 12952), (1619, 12760), (2552, 8095), (3190, 6476), (3238, 6380)]