21359247

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{11177}}^1$

素因数の和:11207

約数の個数: 24

約数和(自身を含む): 35680176

約数和(自身を除く): 14320929

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 11177, 33531, 78239, 145301, 234717, 435903, 547673, 1017107, 1643019, 3051321, 7119749, 21359247]

約数ペア:

[(1, 21359247), (3, 7119749), (7, 3051321), (13, 1643019), (21, 1017107), (39, 547673), (49, 435903), (91, 234717), (147, 145301), (273, 78239), (637, 33531), (1911, 11177)]