20847088

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{193}}^1$

素因数の和:401

約数の個数: 40

約数和(自身を含む): 41809328

約数和(自身を除く): 20962240

約数列:

[1, 2, 4, 8, 16, 43, 86, 157, 172, 193, 314, 344, 386, 628, 688, 772, 1256, 1544, 2512, 3088, 6751, 8299, 13502, 16598, 27004, 30301, 33196, 54008, 60602, 66392, 108016, 121204, 132784, 242408, 484816, 1302943, 2605886, 5211772, 10423544, 20847088]

約数ペア:

[(1, 20847088), (2, 10423544), (4, 5211772), (8, 2605886), (16, 1302943), (43, 484816), (86, 242408), (157, 132784), (172, 121204), (193, 108016), (314, 66392), (344, 60602), (386, 54008), (628, 33196), (688, 30301), (772, 27004), (1256, 16598), (1544, 13502), (2512, 8299), (3088, 6751)]