18212121

素因数分解:

$3^5\times {\mathrm{149}}^1\times {\mathrm{503}}^1$

素因数の和:667

約数の個数: 24

約数和(自身を含む): 27518400

約数和(自身を除く): 9306279

約数列:

[1, 3, 9, 27, 81, 149, 243, 447, 503, 1341, 1509, 4023, 4527, 12069, 13581, 36207, 40743, 74947, 122229, 224841, 674523, 2023569, 6070707, 18212121]

約数ペア:

[(1, 18212121), (3, 6070707), (9, 2023569), (27, 674523), (81, 224841), (149, 122229), (243, 74947), (447, 40743), (503, 36207), (1341, 13581), (1509, 12069), (4023, 4527)]