21000380208

素因数分解:

$2^4\times 3^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{51599}}^1$

素因数の和:51810

約数の個数: 80

約数和(自身を含む): 55538112000

約数和(自身を除く): 34537731792

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 61, 122, 139, 183, 244, 278, 366, 417, 488, 556, 732, 834, 976, 1112, 1464, 1668, 2224, 2928, 3336, 6672, 8479, 16958, 25437, 33916, 50874, 51599, 67832, 101748, 103198, 135664, 154797, 203496, 206396, 309594, 406992, 412792, 619188, 825584, 1238376, 2476752, 3147539, 6295078, 7172261, 9442617, 12590156, 14344522, 18885234, 21516783, 25180312, 28689044, 37770468, 43033566, 50360624, 57378088, 75540936, 86067132, 114756176, 151081872, 172134264, 344268528, 437507921, 875015842, 1312523763, 1750031684, 2625047526, 3500063368, 5250095052, 7000126736, 10500190104, 21000380208]

約数ペア:

[(1, 21000380208), (2, 10500190104), (3, 7000126736), (4, 5250095052), (6, 3500063368), (8, 2625047526), (12, 1750031684), (16, 1312523763), (24, 875015842), (48, 437507921), (61, 344268528), (122, 172134264), (139, 151081872), (183, 114756176), (244, 86067132), (278, 75540936), (366, 57378088), (417, 50360624), (488, 43033566), (556, 37770468), (732, 28689044), (834, 25180312), (976, 21516783), (1112, 18885234), (1464, 14344522), (1668, 12590156), (2224, 9442617), (2928, 7172261), (3336, 6295078), (6672, 3147539), (8479, 2476752), (16958, 1238376), (25437, 825584), (33916, 619188), (50874, 412792), (51599, 406992), (67832, 309594), (101748, 206396), (103198, 203496), (135664, 154797)]