19387720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{317}}^1$

素因数の和:478

約数の個数: 64

約数和(自身を含む): 48081600

約数和(自身を除く): 28693880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 139, 220, 278, 317, 440, 556, 634, 695, 1112, 1268, 1390, 1529, 1585, 2536, 2780, 3058, 3170, 3487, 5560, 6116, 6340, 6974, 7645, 12232, 12680, 13948, 15290, 17435, 27896, 30580, 34870, 44063, 61160, 69740, 88126, 139480, 176252, 220315, 352504, 440630, 484693, 881260, 969386, 1762520, 1938772, 2423465, 3877544, 4846930, 9693860, 19387720]

約数ペア:

[(1, 19387720), (2, 9693860), (4, 4846930), (5, 3877544), (8, 2423465), (10, 1938772), (11, 1762520), (20, 969386), (22, 881260), (40, 484693), (44, 440630), (55, 352504), (88, 220315), (110, 176252), (139, 139480), (220, 88126), (278, 69740), (317, 61160), (440, 44063), (556, 34870), (634, 30580), (695, 27896), (1112, 17435), (1268, 15290), (1390, 13948), (1529, 12680), (1585, 12232), (2536, 7645), (2780, 6974), (3058, 6340), (3170, 6116), (3487, 5560)]