12781881

素因数分解:

$3^4\times 7^1\times {\mathrm{22543}}^1$

素因数の和:22562

約数の個数: 20

約数和(自身を含む): 21822592

約数和(自身を除く): 9040711

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 22543, 67629, 157801, 202887, 473403, 608661, 1420209, 1825983, 4260627, 12781881]

約数ペア:

[(1, 12781881), (3, 4260627), (7, 1825983), (9, 1420209), (21, 608661), (27, 473403), (63, 202887), (81, 157801), (189, 67629), (567, 22543)]