21508978

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{20407}}^1$

素因数の和:20457

約数の個数: 16

約数和(自身を含む): 35265024

約数和(自身を除く): 13756046

約数列:

[1, 2, 17, 31, 34, 62, 527, 1054, 20407, 40814, 346919, 632617, 693838, 1265234, 10754489, 21508978]

約数ペア:

[(1, 21508978), (2, 10754489), (17, 1265234), (31, 693838), (34, 632617), (62, 346919), (527, 40814), (1054, 20407)]