66621680

素因数分解:

$2^4\times 5^1\times {\mathrm{832771}}^1$

素因数の和:832784

約数の個数: 20

約数和(自身を含む): 154895592

約数和(自身を除く): 88273912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 832771, 1665542, 3331084, 4163855, 6662168, 8327710, 13324336, 16655420, 33310840, 66621680]

約数ペア:

[(1, 66621680), (2, 33310840), (4, 16655420), (5, 13324336), (8, 8327710), (10, 6662168), (16, 4163855), (20, 3331084), (40, 1665542), (80, 832771)]