21239248

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30871}}^1$

素因数の和:30922

約数の個数: 20

約数和(自身を含む): 42109408

約数和(自身を除く): 20870160

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30871, 61742, 123484, 246968, 493936, 1327453, 2654906, 5309812, 10619624, 21239248]

約数ペア:

[(1, 21239248), (2, 10619624), (4, 5309812), (8, 2654906), (16, 1327453), (43, 493936), (86, 246968), (172, 123484), (344, 61742), (688, 30871)]