1981899

素因数分解:

$3^2\times {\mathrm{41}}^2\times {\mathrm{131}}^1$

素因数の和:219

約数の個数: 18

約数和(自身を含む): 2956668

約数和(自身を除く): 974769

約数列:

[1, 3, 9, 41, 123, 131, 369, 393, 1179, 1681, 5043, 5371, 15129, 16113, 48339, 220211, 660633, 1981899]

約数ペア:

[(1, 1981899), (3, 660633), (9, 220211), (41, 48339), (123, 16113), (131, 15129), (369, 5371), (393, 5043), (1179, 1681)]