21284721

素因数分解:

$3^3\times {\mathrm{743}}^1\times {\mathrm{1061}}^1$

素因数の和:1813

約数の個数: 16

約数和(自身を含む): 31605120

約数和(自身を除く): 10320399

約数列:

[1, 3, 9, 27, 743, 1061, 2229, 3183, 6687, 9549, 20061, 28647, 788323, 2364969, 7094907, 21284721]

約数ペア:

[(1, 21284721), (3, 7094907), (9, 2364969), (27, 788323), (743, 28647), (1061, 20061), (2229, 9549), (3183, 6687)]