21354381

素因数分解:

$3^3\times {\mathrm{31}}^2\times {\mathrm{823}}^1$

素因数の和:894

約数の個数: 24

約数和(自身を含む): 32729280

約数和(自身を除く): 11374899

約数列:

[1, 3, 9, 27, 31, 93, 279, 823, 837, 961, 2469, 2883, 7407, 8649, 22221, 25513, 25947, 76539, 229617, 688851, 790903, 2372709, 7118127, 21354381]

約数ペア:

[(1, 21354381), (3, 7118127), (9, 2372709), (27, 790903), (31, 688851), (93, 229617), (279, 76539), (823, 25947), (837, 25513), (961, 22221), (2469, 8649), (2883, 7407)]