20970009

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{6997}}^1$

素因数の和:7046

約数の個数: 20

約数和(自身を含む): 32176804

約数和(自身を除く): 11206795

約数列:

[1, 3, 9, 27, 37, 81, 111, 333, 999, 2997, 6997, 20991, 62973, 188919, 258889, 566757, 776667, 2330001, 6990003, 20970009]

約数ペア:

[(1, 20970009), (3, 6990003), (9, 2330001), (27, 776667), (37, 566757), (81, 258889), (111, 188919), (333, 62973), (999, 20991), (2997, 6997)]