21218463

素因数分解:

$3^3\times 7^1\times {\mathrm{131}}^1\times {\mathrm{857}}^1$

素因数の和:1004

約数の個数: 32

約数和(自身を含む): 36241920

約数和(自身を除く): 15023457

約数列:

[1, 3, 7, 9, 21, 27, 63, 131, 189, 393, 857, 917, 1179, 2571, 2751, 3537, 5999, 7713, 8253, 17997, 23139, 24759, 53991, 112267, 161973, 336801, 785869, 1010403, 2357607, 3031209, 7072821, 21218463]

約数ペア:

[(1, 21218463), (3, 7072821), (7, 3031209), (9, 2357607), (21, 1010403), (27, 785869), (63, 336801), (131, 161973), (189, 112267), (393, 53991), (857, 24759), (917, 23139), (1179, 17997), (2571, 8253), (2751, 7713), (3537, 5999)]