21909489

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1277}}^1$

素因数の和:1349

約数の個数: 32

約数和(自身を含む): 35988480

約数和(自身を除く): 14078991

約数列:

[1, 3, 7, 19, 21, 43, 57, 129, 133, 301, 399, 817, 903, 1277, 2451, 3831, 5719, 8939, 17157, 24263, 26817, 54911, 72789, 164733, 169841, 384377, 509523, 1043309, 1153131, 3129927, 7303163, 21909489]

約数ペア:

[(1, 21909489), (3, 7303163), (7, 3129927), (19, 1153131), (21, 1043309), (43, 509523), (57, 384377), (129, 169841), (133, 164733), (301, 72789), (399, 54911), (817, 26817), (903, 24263), (1277, 17157), (2451, 8939), (3831, 5719)]