21191706

素因数分解:

$2^1\times 3^4\times {\mathrm{257}}^1\times {\mathrm{509}}^1$

素因数の和:780

約数の個数: 40

約数和(自身を含む): 47763540

約数和(自身を除く): 26571834

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 162, 257, 509, 514, 771, 1018, 1527, 1542, 2313, 3054, 4581, 4626, 6939, 9162, 13743, 13878, 20817, 27486, 41229, 41634, 82458, 130813, 261626, 392439, 784878, 1177317, 2354634, 3531951, 7063902, 10595853, 21191706]

約数ペア:

[(1, 21191706), (2, 10595853), (3, 7063902), (6, 3531951), (9, 2354634), (18, 1177317), (27, 784878), (54, 392439), (81, 261626), (162, 130813), (257, 82458), (509, 41634), (514, 41229), (771, 27486), (1018, 20817), (1527, 13878), (1542, 13743), (2313, 9162), (3054, 6939), (4581, 4626)]