161568981

素因数分解:

$3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{19577}}^1$

素因数の和:19721

約数の個数: 24

約数和(自身を含む): 268766784

約数和(自身を除く): 107197803

約数列:

[1, 3, 7, 9, 21, 63, 131, 393, 917, 1179, 2751, 8253, 19577, 58731, 137039, 176193, 411117, 1233351, 2564587, 7693761, 17952109, 23081283, 53856327, 161568981]

約数ペア:

[(1, 161568981), (3, 53856327), (7, 23081283), (9, 17952109), (21, 7693761), (63, 2564587), (131, 1233351), (393, 411117), (917, 176193), (1179, 137039), (2751, 58731), (8253, 19577)]