21405873

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{43}}^2\times {\mathrm{227}}^1$

素因数の和:333

約数の個数: 24

約数和(自身を含む): 31075488

約数和(自身を除く): 9669615

約数列:

[1, 3, 17, 43, 51, 129, 227, 681, 731, 1849, 2193, 3859, 5547, 9761, 11577, 29283, 31433, 94299, 165937, 419723, 497811, 1259169, 7135291, 21405873]

約数ペア:

[(1, 21405873), (3, 7135291), (17, 1259169), (43, 497811), (51, 419723), (129, 165937), (227, 94299), (681, 31433), (731, 29283), (1849, 11577), (2193, 9761), (3859, 5547)]