21811881

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{733}}^1$

素因数の和:865

約数の個数: 32

約数和(自身を含む): 36171520

約数和(自身を除く): 14359639

約数列:

[1, 3, 7, 13, 21, 39, 91, 109, 273, 327, 733, 763, 1417, 2199, 2289, 4251, 5131, 9529, 9919, 15393, 28587, 29757, 66703, 79897, 200109, 239691, 559279, 1038661, 1677837, 3115983, 7270627, 21811881]

約数ペア:

[(1, 21811881), (3, 7270627), (7, 3115983), (13, 1677837), (21, 1038661), (39, 559279), (91, 239691), (109, 200109), (273, 79897), (327, 66703), (733, 29757), (763, 28587), (1417, 15393), (2199, 9919), (2289, 9529), (4251, 5131)]