20780216

素因数分解:

$2^3\times {\mathrm{307}}^1\times {\mathrm{8461}}^1$

素因数の和:8774

約数の個数: 16

約数和(自身を含む): 39094440

約数和(自身を除く): 18314224

約数列:

[1, 2, 4, 8, 307, 614, 1228, 2456, 8461, 16922, 33844, 67688, 2597527, 5195054, 10390108, 20780216]

約数ペア:

[(1, 20780216), (2, 10390108), (4, 5195054), (8, 2597527), (307, 67688), (614, 33844), (1228, 16922), (2456, 8461)]