21663981

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{971}}^1$

素因数の和:1081

約数の個数: 24

約数和(自身を含む): 32651424

約数和(自身を除く): 10987443

約数列:

[1, 3, 9, 37, 67, 111, 201, 333, 603, 971, 2479, 2913, 7437, 8739, 22311, 35927, 65057, 107781, 195171, 323343, 585513, 2407109, 7221327, 21663981]

約数ペア:

[(1, 21663981), (3, 7221327), (9, 2407109), (37, 585513), (67, 323343), (111, 195171), (201, 107781), (333, 65057), (603, 35927), (971, 22311), (2479, 8739), (2913, 7437)]