21040161

素因数分解:

$3^1\times {\mathrm{37}}^2\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:233

約数の個数: 24

約数和(自身を含む): 29715840

約数和(自身を除く): 8675679

約数列:

[1, 3, 37, 47, 109, 111, 141, 327, 1369, 1739, 4033, 4107, 5123, 5217, 12099, 15369, 64343, 149221, 189551, 193029, 447663, 568653, 7013387, 21040161]

約数ペア:

[(1, 21040161), (3, 7013387), (37, 568653), (47, 447663), (109, 193029), (111, 189551), (141, 149221), (327, 64343), (1369, 15369), (1739, 12099), (4033, 5217), (4107, 5123)]