20965905

素因数分解:

$3^3\times 5^1\times {\mathrm{155303}}^1$

素因数の和:155317

約数の個数: 16

約数和(自身を含む): 37272960

約数和(自身を除く): 16307055

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155303, 465909, 776515, 1397727, 2329545, 4193181, 6988635, 20965905]

約数ペア:

[(1, 20965905), (3, 6988635), (5, 4193181), (9, 2329545), (15, 1397727), (27, 776515), (45, 465909), (135, 155303)]