18071991

素因数分解:

$3^4\times 7^1\times {\mathrm{31873}}^1$

素因数の和:31892

約数の個数: 20

約数和(自身を含む): 30854032

約数和(自身を除く): 12782041

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 31873, 95619, 223111, 286857, 669333, 860571, 2007999, 2581713, 6023997, 18071991]

約数ペア:

[(1, 18071991), (3, 6023997), (7, 2581713), (9, 2007999), (21, 860571), (27, 669333), (63, 286857), (81, 223111), (189, 95619), (567, 31873)]