20881359

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{683}}^1$

素因数の和:811

約数の個数: 24

約数和(自身を含む): 31299840

約数和(自身を除く): 10418481

約数列:

[1, 3, 9, 43, 79, 129, 237, 387, 683, 711, 2049, 3397, 6147, 10191, 29369, 30573, 53957, 88107, 161871, 264321, 485613, 2320151, 6960453, 20881359]

約数ペア:

[(1, 20881359), (3, 6960453), (9, 2320151), (43, 485613), (79, 264321), (129, 161871), (237, 88107), (387, 53957), (683, 30573), (711, 29369), (2049, 10191), (3397, 6147)]