21604563

素因数分解:

$3^4\times {\mathrm{109}}^1\times {\mathrm{2447}}^1$

素因数の和:2568

約数の個数: 20

約数和(自身を含む): 32582880

約数和(自身を除く): 10978317

約数列:

[1, 3, 9, 27, 81, 109, 327, 981, 2447, 2943, 7341, 8829, 22023, 66069, 198207, 266723, 800169, 2400507, 7201521, 21604563]

約数ペア:

[(1, 21604563), (3, 7201521), (9, 2400507), (27, 800169), (81, 266723), (109, 198207), (327, 66069), (981, 22023), (2447, 8829), (2943, 7341)]