21991664

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{72341}}^1$

素因数の和:72368

約数の個数: 20

約数和(自身を含む): 44852040

約数和(自身を除く): 22860376

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 72341, 144682, 289364, 578728, 1157456, 1374479, 2748958, 5497916, 10995832, 21991664]

約数ペア:

[(1, 21991664), (2, 10995832), (4, 5497916), (8, 2748958), (16, 1374479), (19, 1157456), (38, 578728), (76, 289364), (152, 144682), (304, 72341)]