21439664

素因数分解:

$2^4\times {\mathrm{431}}^1\times {\mathrm{3109}}^1$

素因数の和:3548

約数の個数: 20

約数和(自身を含む): 41649120

約数和(自身を除く): 20209456

約数列:

[1, 2, 4, 8, 16, 431, 862, 1724, 3109, 3448, 6218, 6896, 12436, 24872, 49744, 1339979, 2679958, 5359916, 10719832, 21439664]

約数ペア:

[(1, 21439664), (2, 10719832), (4, 5359916), (8, 2679958), (16, 1339979), (431, 49744), (862, 24872), (1724, 12436), (3109, 6896), (3448, 6218)]