20661285

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{311}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 34265088

約数和(自身を除く): 13603803

約数列:

[1, 3, 5, 15, 43, 103, 129, 215, 309, 311, 515, 645, 933, 1545, 1555, 4429, 4665, 13287, 13373, 22145, 32033, 40119, 66435, 66865, 96099, 160165, 200595, 480495, 1377419, 4132257, 6887095, 20661285]

約数ペア:

[(1, 20661285), (3, 6887095), (5, 4132257), (15, 1377419), (43, 480495), (103, 200595), (129, 160165), (215, 96099), (309, 66865), (311, 66435), (515, 40119), (645, 32033), (933, 22145), (1545, 13373), (1555, 13287), (4429, 4665)]