21805791

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{22093}}^1$

素因数の和:22150

約数の個数: 16

約数和(自身を含む): 33936384

約数和(自身を除く): 12130593

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 22093, 66279, 154651, 463953, 1038371, 3115113, 7268597, 21805791]

約数ペア:

[(1, 21805791), (3, 7268597), (7, 3115113), (21, 1038371), (47, 463953), (141, 154651), (329, 66279), (987, 22093)]