17987781

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{27631}}^1$

素因数の和:27672

約数の個数: 16

約数和(自身を含む): 28295168

約数和(自身を除く): 10307387

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 27631, 82893, 193417, 580251, 856561, 2569683, 5995927, 17987781]

約数ペア:

[(1, 17987781), (3, 5995927), (7, 2569683), (21, 856561), (31, 580251), (93, 193417), (217, 82893), (651, 27631)]