18978393

素因数分解:

$3^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{4993}}^1$

素因数の和:5184

約数の個数: 16

約数和(自身を含む): 29085056

約数和(自身を除く): 10106663

約数列:

[1, 3, 7, 21, 181, 543, 1267, 3801, 4993, 14979, 34951, 104853, 903733, 2711199, 6326131, 18978393]

約数ペア:

[(1, 18978393), (3, 6326131), (7, 2711199), (21, 903733), (181, 104853), (543, 34951), (1267, 14979), (3801, 4993)]