20804864

素因数分解:

$2^8\times {\mathrm{181}}^1\times {\mathrm{449}}^1$

素因数の和:646

約数の個数: 36

約数和(自身を含む): 41850900

約数和(自身を除く): 21046036

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 181, 256, 362, 449, 724, 898, 1448, 1796, 2896, 3592, 5792, 7184, 11584, 14368, 23168, 28736, 46336, 57472, 81269, 114944, 162538, 325076, 650152, 1300304, 2600608, 5201216, 10402432, 20804864]

約数ペア:

[(1, 20804864), (2, 10402432), (4, 5201216), (8, 2600608), (16, 1300304), (32, 650152), (64, 325076), (128, 162538), (181, 114944), (256, 81269), (362, 57472), (449, 46336), (724, 28736), (898, 23168), (1448, 14368), (1796, 11584), (2896, 7184), (3592, 5792)]