21638967

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{281}}^1$

素因数の和:503

約数の個数: 32

約数和(自身を含む): 35013120

約数和(自身を除く): 13374153

約数列:

[1, 3, 7, 19, 21, 57, 133, 193, 281, 399, 579, 843, 1351, 1967, 3667, 4053, 5339, 5901, 11001, 16017, 25669, 37373, 54233, 77007, 112119, 162699, 379631, 1030427, 1138893, 3091281, 7212989, 21638967]

約数ペア:

[(1, 21638967), (3, 7212989), (7, 3091281), (19, 1138893), (21, 1030427), (57, 379631), (133, 162699), (193, 112119), (281, 77007), (399, 54233), (579, 37373), (843, 25669), (1351, 16017), (1967, 11001), (3667, 5901), (4053, 5339)]