28720131

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{21227}}^1$

素因数の和:21282

約数の個数: 16

約数和(自身を含む): 42795648

約数和(自身を除く): 14075517

約数列:

[1, 3, 11, 33, 41, 123, 451, 1353, 21227, 63681, 233497, 700491, 870307, 2610921, 9573377, 28720131]

約数ペア:

[(1, 28720131), (3, 9573377), (11, 2610921), (33, 870307), (41, 700491), (123, 233497), (451, 63681), (1353, 21227)]