20128269

素因数分解:

$3^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{631}}^1$

素因数の和:686

約数の個数: 32

約数和(自身を含む): 32358400

約数和(自身を除く): 12230131

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 343, 631, 651, 1029, 1519, 1893, 4417, 4557, 10633, 13251, 19561, 30919, 31899, 58683, 92757, 136927, 216433, 410781, 649299, 958489, 2875467, 6709423, 20128269]

約数ペア:

[(1, 20128269), (3, 6709423), (7, 2875467), (21, 958489), (31, 649299), (49, 410781), (93, 216433), (147, 136927), (217, 92757), (343, 58683), (631, 31899), (651, 30919), (1029, 19561), (1519, 13251), (1893, 10633), (4417, 4557)]