20658920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12011}}^1$

素因数の和:12065

約数の個数: 32

約数和(自身を含む): 47567520

約数和(自身を除く): 26908600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12011, 24022, 48044, 60055, 96088, 120110, 240220, 480440, 516473, 1032946, 2065892, 2582365, 4131784, 5164730, 10329460, 20658920]

約数ペア:

[(1, 20658920), (2, 10329460), (4, 5164730), (5, 4131784), (8, 2582365), (10, 2065892), (20, 1032946), (40, 516473), (43, 480440), (86, 240220), (172, 120110), (215, 96088), (344, 60055), (430, 48044), (860, 24022), (1720, 12011)]