20413281

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{13691}}^1$

素因数の和:13772

約数の個数: 16

約数和(自身を含む): 31546368

約数和(自身を除く): 11133087

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 13691, 41073, 95837, 287511, 972061, 2916183, 6804427, 20413281]

約数ペア:

[(1, 20413281), (3, 6804427), (7, 2916183), (21, 972061), (71, 287511), (213, 95837), (497, 41073), (1491, 13691)]