20566784

素因数分解:

$2^8\times 7^1\times {\mathrm{23}}^1\times {\mathrm{499}}^1$

素因数の和:545

約数の個数: 72

約数和(自身を含む): 49056000

約数和(自身を除く): 28489216

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 32, 46, 56, 64, 92, 112, 128, 161, 184, 224, 256, 322, 368, 448, 499, 644, 736, 896, 998, 1288, 1472, 1792, 1996, 2576, 2944, 3493, 3992, 5152, 5888, 6986, 7984, 10304, 11477, 13972, 15968, 20608, 22954, 27944, 31936, 41216, 45908, 55888, 63872, 80339, 91816, 111776, 127744, 160678, 183632, 223552, 321356, 367264, 447104, 642712, 734528, 894208, 1285424, 1469056, 2570848, 2938112, 5141696, 10283392, 20566784]

約数ペア:

[(1, 20566784), (2, 10283392), (4, 5141696), (7, 2938112), (8, 2570848), (14, 1469056), (16, 1285424), (23, 894208), (28, 734528), (32, 642712), (46, 447104), (56, 367264), (64, 321356), (92, 223552), (112, 183632), (128, 160678), (161, 127744), (184, 111776), (224, 91816), (256, 80339), (322, 63872), (368, 55888), (448, 45908), (499, 41216), (644, 31936), (736, 27944), (896, 22954), (998, 20608), (1288, 15968), (1472, 13972), (1792, 11477), (1996, 10304), (2576, 7984), (2944, 6986), (3493, 5888), (3992, 5152)]