21787885

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{467}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 31629312

約数和(自身を除く): 9841427

約数列:

[1, 5, 7, 31, 35, 43, 155, 215, 217, 301, 467, 1085, 1333, 1505, 2335, 3269, 6665, 9331, 14477, 16345, 20081, 46655, 72385, 100405, 101339, 140567, 506695, 622511, 702835, 3112555, 4357577, 21787885]

約数ペア:

[(1, 21787885), (5, 4357577), (7, 3112555), (31, 702835), (35, 622511), (43, 506695), (155, 140567), (215, 101339), (217, 100405), (301, 72385), (467, 46655), (1085, 20081), (1333, 16345), (1505, 14477), (2335, 9331), (3269, 6665)]