20851569

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1999}}^1$

素因数の和:2085

約数の個数: 24

約数和(自身を含む): 32240000

約数和(自身を除く): 11388431

約数列:

[1, 3, 9, 19, 57, 61, 171, 183, 549, 1159, 1999, 3477, 5997, 10431, 17991, 37981, 113943, 121939, 341829, 365817, 1097451, 2316841, 6950523, 20851569]

約数ペア:

[(1, 20851569), (3, 6950523), (9, 2316841), (19, 1097451), (57, 365817), (61, 341829), (171, 121939), (183, 113943), (549, 37981), (1159, 17991), (1999, 10431), (3477, 5997)]