21947261

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{3511}}^1$

素因数の和:3584

約数の個数: 16

約数和(自身を含む): 26972160

約数和(自身を除く): 5024899

約数列:

[1, 7, 19, 47, 133, 329, 893, 3511, 6251, 24577, 66709, 165017, 466963, 1155119, 3135323, 21947261]

約数ペア:

[(1, 21947261), (7, 3135323), (19, 1155119), (47, 466963), (133, 165017), (329, 66709), (893, 24577), (3511, 6251)]