18157881

素因数分解:

$3^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{1223}}^1$

素因数の和:1341

約数の個数: 24

約数和(自身を含む): 28465344

約数和(自身を除く): 10307463

約数列:

[1, 3, 7, 21, 49, 101, 147, 303, 707, 1223, 2121, 3669, 4949, 8561, 14847, 25683, 59927, 123523, 179781, 370569, 864661, 2593983, 6052627, 18157881]

約数ペア:

[(1, 18157881), (3, 6052627), (7, 2593983), (21, 864661), (49, 370569), (101, 179781), (147, 123523), (303, 59927), (707, 25683), (1223, 14847), (2121, 8561), (3669, 4949)]