81210280

素因数分解:

$2^3\times 5^1\times {\mathrm{2030257}}^1$

素因数の和:2030268

約数の個数: 16

約数和(自身を含む): 182723220

約数和(自身を除く): 101512940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2030257, 4060514, 8121028, 10151285, 16242056, 20302570, 40605140, 81210280]

約数ペア:

[(1, 81210280), (2, 40605140), (4, 20302570), (5, 16242056), (8, 10151285), (10, 8121028), (20, 4060514), (40, 2030257)]