20512005

素因数分解:

$3^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{4397}}^1$

素因数の和:4716

約数の個数: 16

約数和(自身を含む): 32932224

約数和(自身を除く): 12420219

約数列:

[1, 3, 5, 15, 311, 933, 1555, 4397, 4665, 13191, 21985, 65955, 1367467, 4102401, 6837335, 20512005]

約数ペア:

[(1, 20512005), (3, 6837335), (5, 4102401), (15, 1367467), (311, 65955), (933, 21985), (1555, 13191), (4397, 4665)]