21997689

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{881}}^1$

素因数の和:961

約数の個数: 32

約数和(自身を含む): 35562240

約数和(自身を除く): 13564551

約数列:

[1, 3, 7, 21, 29, 41, 87, 123, 203, 287, 609, 861, 881, 1189, 2643, 3567, 6167, 8323, 18501, 24969, 25549, 36121, 76647, 108363, 178843, 252847, 536529, 758541, 1047509, 3142527, 7332563, 21997689]

約数ペア:

[(1, 21997689), (3, 7332563), (7, 3142527), (21, 1047509), (29, 758541), (41, 536529), (87, 252847), (123, 178843), (203, 108363), (287, 76647), (609, 36121), (861, 25549), (881, 24969), (1189, 18501), (2643, 8323), (3567, 6167)]