20845712

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{739}}^1$

素因数の和:831

約数の個数: 40

約数和(自身を含む): 42393120

約数和(自身を除く): 21547408

約数列:

[1, 2, 4, 8, 16, 41, 43, 82, 86, 164, 172, 328, 344, 656, 688, 739, 1478, 1763, 2956, 3526, 5912, 7052, 11824, 14104, 28208, 30299, 31777, 60598, 63554, 121196, 127108, 242392, 254216, 484784, 508432, 1302857, 2605714, 5211428, 10422856, 20845712]

約数ペア:

[(1, 20845712), (2, 10422856), (4, 5211428), (8, 2605714), (16, 1302857), (41, 508432), (43, 484784), (82, 254216), (86, 242392), (164, 127108), (172, 121196), (328, 63554), (344, 60598), (656, 31777), (688, 30299), (739, 28208), (1478, 14104), (1763, 11824), (2956, 7052), (3526, 5912)]