20521821

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{1697}}^1$

素因数の和:1868

約数の個数: 16

約数和(自身を含む): 28526400

約数和(自身を除く): 8004579

約数列:

[1, 3, 29, 87, 139, 417, 1697, 4031, 5091, 12093, 49213, 147639, 235883, 707649, 6840607, 20521821]

約数ペア:

[(1, 20521821), (3, 6840607), (29, 707649), (87, 235883), (139, 147639), (417, 49213), (1697, 12093), (4031, 5091)]