20991078

素因数分解:

$2^1\times 3^2\times {\mathrm{971}}^1\times {\mathrm{1201}}^1$

素因数の和:2180

約数の個数: 24

約数和(自身を含む): 45565416

約数和(自身を除く): 24574338

約数列:

[1, 2, 3, 6, 9, 18, 971, 1201, 1942, 2402, 2913, 3603, 5826, 7206, 8739, 10809, 17478, 21618, 1166171, 2332342, 3498513, 6997026, 10495539, 20991078]

約数ペア:

[(1, 20991078), (2, 10495539), (3, 6997026), (6, 3498513), (9, 2332342), (18, 1166171), (971, 21618), (1201, 17478), (1942, 10809), (2402, 8739), (2913, 7206), (3603, 5826)]