21120183

素因数分解:

$3^4\times 7^1\times {\mathrm{193}}^2$

素因数の和:405

約数の個数: 30

約数和(自身を含む): 36244824

約数和(自身を除く): 15124641

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 193, 567, 579, 1351, 1737, 4053, 5211, 12159, 15633, 36477, 37249, 109431, 111747, 260743, 335241, 782229, 1005723, 2346687, 3017169, 7040061, 21120183]

約数ペア:

[(1, 21120183), (3, 7040061), (7, 3017169), (9, 2346687), (21, 1005723), (27, 782229), (63, 335241), (81, 260743), (189, 111747), (193, 109431), (567, 37249), (579, 36477), (1351, 15633), (1737, 12159), (4053, 5211)]