81317080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{353}}^1\times {\mathrm{443}}^1$

素因数の和:820

約数の個数: 64

約数和(自身を含む): 198041760

約数和(自身を除く): 116724680

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 353, 443, 520, 706, 886, 1412, 1765, 1772, 2215, 2824, 3530, 3544, 4430, 4589, 5759, 7060, 8860, 9178, 11518, 14120, 17720, 18356, 22945, 23036, 28795, 36712, 45890, 46072, 57590, 91780, 115180, 156379, 183560, 230360, 312758, 625516, 781895, 1251032, 1563790, 2032927, 3127580, 4065854, 6255160, 8131708, 10164635, 16263416, 20329270, 40658540, 81317080]

約数ペア:

[(1, 81317080), (2, 40658540), (4, 20329270), (5, 16263416), (8, 10164635), (10, 8131708), (13, 6255160), (20, 4065854), (26, 3127580), (40, 2032927), (52, 1563790), (65, 1251032), (104, 781895), (130, 625516), (260, 312758), (353, 230360), (443, 183560), (520, 156379), (706, 115180), (886, 91780), (1412, 57590), (1765, 46072), (1772, 45890), (2215, 36712), (2824, 28795), (3530, 23036), (3544, 22945), (4430, 18356), (4589, 17720), (5759, 14120), (7060, 11518), (8860, 9178)]