20806520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3911}}^1$

素因数の和:3948

約数の個数: 64

約数和(自身を含む): 56332800

約数和(自身を除く): 35526280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 3911, 5320, 7822, 15644, 19555, 27377, 31288, 39110, 54754, 74309, 78220, 109508, 136885, 148618, 156440, 219016, 273770, 297236, 371545, 520163, 547540, 594472, 743090, 1040326, 1095080, 1486180, 2080652, 2600815, 2972360, 4161304, 5201630, 10403260, 20806520]

約数ペア:

[(1, 20806520), (2, 10403260), (4, 5201630), (5, 4161304), (7, 2972360), (8, 2600815), (10, 2080652), (14, 1486180), (19, 1095080), (20, 1040326), (28, 743090), (35, 594472), (38, 547540), (40, 520163), (56, 371545), (70, 297236), (76, 273770), (95, 219016), (133, 156440), (140, 148618), (152, 136885), (190, 109508), (266, 78220), (280, 74309), (380, 54754), (532, 39110), (665, 31288), (760, 27377), (1064, 19555), (1330, 15644), (2660, 7822), (3911, 5320)]