20855421

素因数分解:

$3^3\times {\mathrm{139}}^1\times {\mathrm{5557}}^1$

素因数の和:5705

約数の個数: 16

約数和(自身を含む): 31124800

約数和(自身を除く): 10269379

約数列:

[1, 3, 9, 27, 139, 417, 1251, 3753, 5557, 16671, 50013, 150039, 772423, 2317269, 6951807, 20855421]

約数ペア:

[(1, 20855421), (3, 6951807), (9, 2317269), (27, 772423), (139, 150039), (417, 50013), (1251, 16671), (3753, 5557)]