21011643

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15259}}^1$

素因数の和:15288

約数の個数: 20

約数和(自身を含む): 33236280

約数和(自身を除く): 12224637

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15259, 45777, 137331, 259403, 411993, 778209, 1235979, 2334627, 7003881, 21011643]

約数ペア:

[(1, 21011643), (3, 7003881), (9, 2334627), (17, 1235979), (27, 778209), (51, 411993), (81, 259403), (153, 137331), (459, 45777), (1377, 15259)]