21877209

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{11743}}^1$

素因数の和:11778

約数の個数: 20

約数和(自身を含む): 34104576

約数和(自身を除く): 12227367

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 11743, 35229, 105687, 270089, 317061, 810267, 951183, 2430801, 7292403, 21877209]

約数ペア:

[(1, 21877209), (3, 7292403), (9, 2430801), (23, 951183), (27, 810267), (69, 317061), (81, 270089), (207, 105687), (621, 35229), (1863, 11743)]