20943531

素因数分解:

$3^2\times 7^2\times {\mathrm{47491}}^1$

素因数の和:47511

約数の個数: 18

約数和(自身を含む): 35191572

約数和(自身を除く): 14248041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47491, 142473, 332437, 427419, 997311, 2327059, 2991933, 6981177, 20943531]

約数ペア:

[(1, 20943531), (3, 6981177), (7, 2991933), (9, 2327059), (21, 997311), (49, 427419), (63, 332437), (147, 142473), (441, 47491)]