21256587

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{23857}}^1$

素因数の和:23880

約数の個数: 20

約数和(自身を含む): 34641816

約数和(自身を除く): 13385229

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 297, 891, 23857, 71571, 214713, 262427, 644139, 787281, 1932417, 2361843, 7085529, 21256587]

約数ペア:

[(1, 21256587), (3, 7085529), (9, 2361843), (11, 1932417), (27, 787281), (33, 644139), (81, 262427), (99, 214713), (297, 71571), (891, 23857)]