21804784

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{773}}^1$

素因数の和:865

約数の個数: 40

約数和(自身を含む): 44340912

約数和(自身を除く): 22536128

約数列:

[1, 2, 4, 8, 16, 41, 43, 82, 86, 164, 172, 328, 344, 656, 688, 773, 1546, 1763, 3092, 3526, 6184, 7052, 12368, 14104, 28208, 31693, 33239, 63386, 66478, 126772, 132956, 253544, 265912, 507088, 531824, 1362799, 2725598, 5451196, 10902392, 21804784]

約数ペア:

[(1, 21804784), (2, 10902392), (4, 5451196), (8, 2725598), (16, 1362799), (41, 531824), (43, 507088), (82, 265912), (86, 253544), (164, 132956), (172, 126772), (328, 66478), (344, 63386), (656, 33239), (688, 31693), (773, 28208), (1546, 14104), (1763, 12368), (3092, 7052), (3526, 6184)]