18722907

素因数分解:

$3^7\times 7^1\times {\mathrm{1223}}^1$

素因数の和:1251

約数の個数: 32

約数和(自身を含む): 32117760

約数和(自身を除く): 13394853

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1223, 1701, 2187, 3669, 5103, 8561, 11007, 15309, 25683, 33021, 77049, 99063, 231147, 297189, 693441, 891567, 2080323, 2674701, 6240969, 18722907]

約数ペア:

[(1, 18722907), (3, 6240969), (7, 2674701), (9, 2080323), (21, 891567), (27, 693441), (63, 297189), (81, 231147), (189, 99063), (243, 77049), (567, 33021), (729, 25683), (1223, 15309), (1701, 11007), (2187, 8561), (3669, 5103)]