20989136

素因数分解:

$2^4\times 7^1\times {\mathrm{193}}^1\times {\mathrm{971}}^1$

素因数の和:1179

約数の個数: 40

約数和(自身を含む): 46764864

約数和(自身を除く): 25775728

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 193, 386, 772, 971, 1351, 1544, 1942, 2702, 3088, 3884, 5404, 6797, 7768, 10808, 13594, 15536, 21616, 27188, 54376, 108752, 187403, 374806, 749612, 1311821, 1499224, 2623642, 2998448, 5247284, 10494568, 20989136]

約数ペア:

[(1, 20989136), (2, 10494568), (4, 5247284), (7, 2998448), (8, 2623642), (14, 1499224), (16, 1311821), (28, 749612), (56, 374806), (112, 187403), (193, 108752), (386, 54376), (772, 27188), (971, 21616), (1351, 15536), (1544, 13594), (1942, 10808), (2702, 7768), (3088, 6797), (3884, 5404)]