18956721

素因数分解:

$3^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{3331}}^1$

素因数の和:3612

約数の個数: 16

約数和(自身を含む): 29001728

約数和(自身を除く): 10045007

約数列:

[1, 3, 7, 21, 271, 813, 1897, 3331, 5691, 9993, 23317, 69951, 902701, 2708103, 6318907, 18956721]

約数ペア:

[(1, 18956721), (3, 6318907), (7, 2708103), (21, 902701), (271, 69951), (813, 23317), (1897, 9993), (3331, 5691)]