21081868

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{6451}}^1$

素因数の和:6517

約数の個数: 24

約数和(自身を含む): 39744320

約数和(自身を除く): 18662452

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 172, 817, 1634, 3268, 6451, 12902, 25804, 122569, 245138, 277393, 490276, 554786, 1109572, 5270467, 10540934, 21081868]

約数ペア:

[(1, 21081868), (2, 10540934), (4, 5270467), (19, 1109572), (38, 554786), (43, 490276), (76, 277393), (86, 245138), (172, 122569), (817, 25804), (1634, 12902), (3268, 6451)]