20021781

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{1471}}^1$

素因数の和:1836

約数の個数: 16

約数和(自身を含む): 28851200

約数和(自身を除く): 8829419

約数列:

[1, 3, 13, 39, 349, 1047, 1471, 4413, 4537, 13611, 19123, 57369, 513379, 1540137, 6673927, 20021781]

約数ペア:

[(1, 20021781), (3, 6673927), (13, 1540137), (39, 513379), (349, 57369), (1047, 19123), (1471, 13611), (4413, 4537)]