18420381

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{6221}}^1$

素因数の和:6281

約数の個数: 24

約数和(自身を含む): 31060224

約数和(自身を除く): 12639843

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 6221, 18663, 43547, 55989, 130641, 292387, 391923, 877161, 2046709, 2631483, 6140127, 18420381]

約数ペア:

[(1, 18420381), (3, 6140127), (7, 2631483), (9, 2046709), (21, 877161), (47, 391923), (63, 292387), (141, 130641), (329, 55989), (423, 43547), (987, 18663), (2961, 6221)]