20557784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{4597}}^1$

素因数の和:4659

約数の個数: 32

約数和(自身を含む): 42485520

約数和(自身を除く): 21927736

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 172, 344, 559, 1118, 2236, 4472, 4597, 9194, 18388, 36776, 59761, 119522, 197671, 239044, 395342, 478088, 790684, 1581368, 2569723, 5139446, 10278892, 20557784]

約数ペア:

[(1, 20557784), (2, 10278892), (4, 5139446), (8, 2569723), (13, 1581368), (26, 790684), (43, 478088), (52, 395342), (86, 239044), (104, 197671), (172, 119522), (344, 59761), (559, 36776), (1118, 18388), (2236, 9194), (4472, 4597)]