20405504

素因数分解:

$2^8\times 7^1\times {\mathrm{59}}^1\times {\mathrm{193}}^1$

素因数の和:275

約数の個数: 72

約数和(自身を含む): 47584320

約数和(自身を除く): 27178816

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 59, 64, 112, 118, 128, 193, 224, 236, 256, 386, 413, 448, 472, 772, 826, 896, 944, 1351, 1544, 1652, 1792, 1888, 2702, 3088, 3304, 3776, 5404, 6176, 6608, 7552, 10808, 11387, 12352, 13216, 15104, 21616, 22774, 24704, 26432, 43232, 45548, 49408, 52864, 79709, 86464, 91096, 105728, 159418, 172928, 182192, 318836, 345856, 364384, 637672, 728768, 1275344, 1457536, 2550688, 2915072, 5101376, 10202752, 20405504]

約数ペア:

[(1, 20405504), (2, 10202752), (4, 5101376), (7, 2915072), (8, 2550688), (14, 1457536), (16, 1275344), (28, 728768), (32, 637672), (56, 364384), (59, 345856), (64, 318836), (112, 182192), (118, 172928), (128, 159418), (193, 105728), (224, 91096), (236, 86464), (256, 79709), (386, 52864), (413, 49408), (448, 45548), (472, 43232), (772, 26432), (826, 24704), (896, 22774), (944, 21616), (1351, 15104), (1544, 13216), (1652, 12352), (1792, 11387), (1888, 10808), (2702, 7552), (3088, 6608), (3304, 6176), (3776, 5404)]