21987812

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71389}}^1$

素因数の和:71411

約数の個数: 24

約数和(自身を含む): 47974080

約数和(自身を除く): 25986268

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308, 71389, 142778, 285556, 499723, 785279, 999446, 1570558, 1998892, 3141116, 5496953, 10993906, 21987812]

約数ペア:

[(1, 21987812), (2, 10993906), (4, 5496953), (7, 3141116), (11, 1998892), (14, 1570558), (22, 999446), (28, 785279), (44, 499723), (77, 285556), (154, 142778), (308, 71389)]