20691560

素因数分解:

$2^3\times 5^1\times {\mathrm{517289}}^1$

素因数の和:517300

約数の個数: 16

約数和(自身を含む): 46556100

約数和(自身を除く): 25864540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 517289, 1034578, 2069156, 2586445, 4138312, 5172890, 10345780, 20691560]

約数ペア:

[(1, 20691560), (2, 10345780), (4, 5172890), (5, 4138312), (8, 2586445), (10, 2069156), (20, 1034578), (40, 517289)]