21439628

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{17807}}^1$

素因数の和:17861

約数の個数: 24

約数和(自身を含む): 43878912

約数和(自身を除く): 22439284

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 602, 1204, 17807, 35614, 71228, 124649, 249298, 498596, 765701, 1531402, 3062804, 5359907, 10719814, 21439628]

約数ペア:

[(1, 21439628), (2, 10719814), (4, 5359907), (7, 3062804), (14, 1531402), (28, 765701), (43, 498596), (86, 249298), (172, 124649), (301, 71228), (602, 35614), (1204, 17807)]