21644721

素因数分解:

$3^2\times 7^2\times {\mathrm{49081}}^1$

素因数の和:49101

約数の個数: 18

約数和(自身を含む): 36369762

約数和(自身を除く): 14725041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 49081, 147243, 343567, 441729, 1030701, 2404969, 3092103, 7214907, 21644721]

約数ペア:

[(1, 21644721), (3, 7214907), (7, 3092103), (9, 2404969), (21, 1030701), (49, 441729), (63, 343567), (147, 147243), (441, 49081)]