20403867440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1220327}}^1$

素因数の和:1220370

約数の個数: 80

約数和(自身を含む): 54475441920

約数和(自身を除く): 34071574480

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1520, 1672, 2090, 3344, 4180, 8360, 16720, 1220327, 2440654, 4881308, 6101635, 9762616, 12203270, 13423597, 19525232, 23186213, 24406540, 26847194, 46372426, 48813080, 53694388, 67117985, 92744852, 97626160, 107388776, 115931065, 134235970, 185489704, 214777552, 231862130, 255048343, 268471940, 370979408, 463724260, 510096686, 536943880, 927448520, 1020193372, 1073887760, 1275241715, 1854897040, 2040386744, 2550483430, 4080773488, 5100966860, 10201933720, 20403867440]

約数ペア:

[(1, 20403867440), (2, 10201933720), (4, 5100966860), (5, 4080773488), (8, 2550483430), (10, 2040386744), (11, 1854897040), (16, 1275241715), (19, 1073887760), (20, 1020193372), (22, 927448520), (38, 536943880), (40, 510096686), (44, 463724260), (55, 370979408), (76, 268471940), (80, 255048343), (88, 231862130), (95, 214777552), (110, 185489704), (152, 134235970), (176, 115931065), (190, 107388776), (209, 97626160), (220, 92744852), (304, 67117985), (380, 53694388), (418, 48813080), (440, 46372426), (760, 26847194), (836, 24406540), (880, 23186213), (1045, 19525232), (1520, 13423597), (1672, 12203270), (2090, 9762616), (3344, 6101635), (4180, 4881308), (8360, 2440654), (16720, 1220327)]