20503808

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:191

約数の個数: 72

約数和(自身を含む): 45241896

約数和(自身を除く): 24738088

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 61, 64, 101, 104, 122, 128, 202, 208, 244, 256, 404, 416, 488, 793, 808, 832, 976, 1313, 1586, 1616, 1664, 1952, 2626, 3172, 3232, 3328, 3904, 5252, 6161, 6344, 6464, 7808, 10504, 12322, 12688, 12928, 15616, 21008, 24644, 25376, 25856, 42016, 49288, 50752, 80093, 84032, 98576, 101504, 160186, 168064, 197152, 203008, 320372, 336128, 394304, 640744, 788608, 1281488, 1577216, 2562976, 5125952, 10251904, 20503808]

約数ペア:

[(1, 20503808), (2, 10251904), (4, 5125952), (8, 2562976), (13, 1577216), (16, 1281488), (26, 788608), (32, 640744), (52, 394304), (61, 336128), (64, 320372), (101, 203008), (104, 197152), (122, 168064), (128, 160186), (202, 101504), (208, 98576), (244, 84032), (256, 80093), (404, 50752), (416, 49288), (488, 42016), (793, 25856), (808, 25376), (832, 24644), (976, 21008), (1313, 15616), (1586, 12928), (1616, 12688), (1664, 12322), (1952, 10504), (2626, 7808), (3172, 6464), (3232, 6344), (3328, 6161), (3904, 5252)]