18871209

素因数分解:

$3^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{5077}}^1$

素因数の和:5149

約数の個数: 24

約数和(自身を含む): 31686720

約数和(自身を除く): 12815511

約数列:

[1, 3, 7, 9, 21, 59, 63, 177, 413, 531, 1239, 3717, 5077, 15231, 35539, 45693, 106617, 299543, 319851, 898629, 2096801, 2695887, 6290403, 18871209]

約数ペア:

[(1, 18871209), (3, 6290403), (7, 2695887), (9, 2096801), (21, 898629), (59, 319851), (63, 299543), (177, 106617), (413, 45693), (531, 35539), (1239, 15231), (3717, 5077)]