20809943

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{311}}^1$

素因数の和:419

約数の個数: 24

約数和(自身を含む): 26557440

約数和(自身を除く): 5747497

約数列:

[1, 7, 11, 77, 79, 121, 311, 553, 847, 869, 2177, 3421, 6083, 9559, 23947, 24569, 37631, 66913, 171983, 263417, 270259, 1891813, 2972849, 20809943]

約数ペア:

[(1, 20809943), (7, 2972849), (11, 1891813), (77, 270259), (79, 263417), (121, 171983), (311, 66913), (553, 37631), (847, 24569), (869, 23947), (2177, 9559), (3421, 6083)]