20778556

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{9857}}^1$

素因数の和:9909

約数の個数: 24

約数和(自身を含む): 39747456

約数和(自身を除く): 18968900

約数列:

[1, 2, 4, 17, 31, 34, 62, 68, 124, 527, 1054, 2108, 9857, 19714, 39428, 167569, 305567, 335138, 611134, 670276, 1222268, 5194639, 10389278, 20778556]

約数ペア:

[(1, 20778556), (2, 10389278), (4, 5194639), (17, 1222268), (31, 670276), (34, 611134), (62, 335138), (68, 305567), (124, 167569), (527, 39428), (1054, 19714), (2108, 9857)]