20903865

素因数分解:

$3^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{4481}}^1$

素因数の和:4800

約数の個数: 16

約数和(自身を含む): 33561216

約数和(自身を除く): 12657351

約数列:

[1, 3, 5, 15, 311, 933, 1555, 4481, 4665, 13443, 22405, 67215, 1393591, 4180773, 6967955, 20903865]

約数ペア:

[(1, 20903865), (3, 6967955), (5, 4180773), (15, 1393591), (311, 67215), (933, 22405), (1555, 13443), (4481, 4665)]