20903889

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{4241}}^1$

素因数の和:4328

約数の個数: 16

約数和(自身を含む): 29320704

約数和(自身を除く): 8416815

約数列:

[1, 3, 31, 53, 93, 159, 1643, 4241, 4929, 12723, 131471, 224773, 394413, 674319, 6967963, 20903889]

約数ペア:

[(1, 20903889), (3, 6967963), (31, 674319), (53, 394413), (93, 224773), (159, 131471), (1643, 12723), (4241, 4929)]