20921649

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12611}}^1$

素因数の和:12700

約数の個数: 16

約数和(自身を含む): 32286720

約数和(自身を除く): 11365071

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12611, 37833, 88277, 264831, 996269, 2988807, 6973883, 20921649]

約数ペア:

[(1, 20921649), (3, 6973883), (7, 2988807), (21, 996269), (79, 264831), (237, 88277), (553, 37833), (1659, 12611)]