20991669

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{233}}^1\times {\mathrm{509}}^1$

素因数の和:804

約数の個数: 16

約数和(自身を含む): 28641600

約数和(自身を除く): 7649931

約数列:

[1, 3, 59, 177, 233, 509, 699, 1527, 13747, 30031, 41241, 90093, 118597, 355791, 6997223, 20991669]

約数ペア:

[(1, 20991669), (3, 6997223), (59, 355791), (177, 118597), (233, 90093), (509, 41241), (699, 30031), (1527, 13747)]