21998211

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{1697}}^1$

素因数の和:1878

約数の個数: 16

約数和(自身を含む): 30564000

約数和(自身を除く): 8565789

約数列:

[1, 3, 29, 87, 149, 447, 1697, 4321, 5091, 12963, 49213, 147639, 252853, 758559, 7332737, 21998211]

約数ペア:

[(1, 21998211), (3, 7332737), (29, 758559), (87, 252853), (149, 147639), (447, 49213), (1697, 12963), (4321, 5091)]