21420819

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{8293}}^1$

素因数の和:8347

約数の個数: 24

約数和(自身を含む): 36228192

約数和(自身を除く): 14807373

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 8293, 24879, 58051, 74637, 174153, 340013, 522459, 1020039, 2380091, 3060117, 7140273, 21420819]

約数ペア:

[(1, 21420819), (3, 7140273), (7, 3060117), (9, 2380091), (21, 1020039), (41, 522459), (63, 340013), (123, 174153), (287, 74637), (369, 58051), (861, 24879), (2583, 8293)]