21000887992

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{8721299}}^1$

素因数の和:8721355

約数の個数: 32

約数和(自身を含む): 46048464000

約数和(自身を除く): 25047576008

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 86, 172, 301, 344, 602, 1204, 2408, 8721299, 17442598, 34885196, 61049093, 69770392, 122098186, 244196372, 375015857, 488392744, 750031714, 1500063428, 2625110999, 3000126856, 5250221998, 10500443996, 21000887992]

約数ペア:

[(1, 21000887992), (2, 10500443996), (4, 5250221998), (7, 3000126856), (8, 2625110999), (14, 1500063428), (28, 750031714), (43, 488392744), (56, 375015857), (86, 244196372), (172, 122098186), (301, 69770392), (344, 61049093), (602, 34885196), (1204, 17442598), (2408, 8721299)]