77810920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1987}}^1$

素因数の和:2098

約数の個数: 64

約数和(自身を含む): 193233600

約数和(自身を除く): 115422680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 89, 110, 178, 220, 356, 440, 445, 712, 890, 979, 1780, 1958, 1987, 3560, 3916, 3974, 4895, 7832, 7948, 9790, 9935, 15896, 19580, 19870, 21857, 39160, 39740, 43714, 79480, 87428, 109285, 174856, 176843, 218570, 353686, 437140, 707372, 874280, 884215, 1414744, 1768430, 1945273, 3536860, 3890546, 7073720, 7781092, 9726365, 15562184, 19452730, 38905460, 77810920]

約数ペア:

[(1, 77810920), (2, 38905460), (4, 19452730), (5, 15562184), (8, 9726365), (10, 7781092), (11, 7073720), (20, 3890546), (22, 3536860), (40, 1945273), (44, 1768430), (55, 1414744), (88, 884215), (89, 874280), (110, 707372), (178, 437140), (220, 353686), (356, 218570), (440, 176843), (445, 174856), (712, 109285), (890, 87428), (979, 79480), (1780, 43714), (1958, 39740), (1987, 39160), (3560, 21857), (3916, 19870), (3974, 19580), (4895, 15896), (7832, 9935), (7948, 9790)]