19911578

素因数分解:

$2^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1\times {\mathrm{521}}^1$

素因数の和:817

約数の個数: 16

約数和(自身を含む): 30386664

約数和(自身を除く): 10475086

約数列:

[1, 2, 97, 194, 197, 394, 521, 1042, 19109, 38218, 50537, 101074, 102637, 205274, 9955789, 19911578]

約数ペア:

[(1, 19911578), (2, 9955789), (97, 205274), (194, 102637), (197, 101074), (394, 50537), (521, 38218), (1042, 19109)]