17989209

素因数分解:

$3^4\times 7^1\times {\mathrm{31727}}^1$

素因数の和:31746

約数の個数: 20

約数和(自身を含む): 30712704

約数和(自身を除く): 12723495

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 31727, 95181, 222089, 285543, 666267, 856629, 1998801, 2569887, 5996403, 17989209]

約数ペア:

[(1, 17989209), (3, 5996403), (7, 2569887), (9, 1998801), (21, 856629), (27, 666267), (63, 285543), (81, 222089), (189, 95181), (567, 31727)]