20666661

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{6841}}^1$

素因数の和:6916

約数の個数: 16

約数和(自身を含む): 29557440

約数和(自身を除く): 8890779

約数列:

[1, 3, 19, 53, 57, 159, 1007, 3021, 6841, 20523, 129979, 362573, 389937, 1087719, 6888887, 20666661]

約数ペア:

[(1, 20666661), (3, 6888887), (19, 1087719), (53, 389937), (57, 362573), (159, 129979), (1007, 20523), (3021, 6841)]