20880069

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1217}}^1$

素因数の和:1289

約数の個数: 32

約数和(自身を含む): 34298880

約数和(自身を除く): 13418811

約数列:

[1, 3, 7, 19, 21, 43, 57, 129, 133, 301, 399, 817, 903, 1217, 2451, 3651, 5719, 8519, 17157, 23123, 25557, 52331, 69369, 156993, 161861, 366317, 485583, 994289, 1098951, 2982867, 6960023, 20880069]

約数ペア:

[(1, 20880069), (3, 6960023), (7, 2982867), (19, 1098951), (21, 994289), (43, 485583), (57, 366317), (129, 161861), (133, 156993), (301, 69369), (399, 52331), (817, 25557), (903, 23123), (1217, 17157), (2451, 8519), (3651, 5719)]