20917197

素因数分解:

$3^6\times 7^1\times {\mathrm{4099}}^1$

素因数の和:4124

約数の個数: 28

約数和(自身を含む): 35850400

約数和(自身を除く): 14933203

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 4099, 5103, 12297, 28693, 36891, 86079, 110673, 258237, 332019, 774711, 996057, 2324133, 2988171, 6972399, 20917197]

約数ペア:

[(1, 20917197), (3, 6972399), (7, 2988171), (9, 2324133), (21, 996057), (27, 774711), (63, 332019), (81, 258237), (189, 110673), (243, 86079), (567, 36891), (729, 28693), (1701, 12297), (4099, 5103)]