21859805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12821}}^1$

素因数の和:12868

約数の個数: 16

約数和(自身を含む): 29541888

約数和(自身を除く): 7682083

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12821, 64105, 141031, 397451, 705155, 1987255, 4371961, 21859805]

約数ペア:

[(1, 21859805), (5, 4371961), (11, 1987255), (31, 705155), (55, 397451), (155, 141031), (341, 64105), (1705, 12821)]