20605557

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1201}}^1$

素因数の和:1273

約数の個数: 32

約数和(自身を含む): 33848320

約数和(自身を除く): 13242763

約数列:

[1, 3, 7, 19, 21, 43, 57, 129, 133, 301, 399, 817, 903, 1201, 2451, 3603, 5719, 8407, 17157, 22819, 25221, 51643, 68457, 154929, 159733, 361501, 479199, 981217, 1084503, 2943651, 6868519, 20605557]

約数ペア:

[(1, 20605557), (3, 6868519), (7, 2943651), (19, 1084503), (21, 981217), (43, 479199), (57, 361501), (129, 159733), (133, 154929), (301, 68457), (399, 51643), (817, 25221), (903, 22819), (1201, 17157), (2451, 8407), (3603, 5719)]