20681108

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{193}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 43021440

約数和(自身を除く): 22340332

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 89, 172, 178, 193, 301, 356, 386, 602, 623, 772, 1204, 1246, 1351, 2492, 2702, 3827, 5404, 7654, 8299, 15308, 16598, 17177, 26789, 33196, 34354, 53578, 58093, 68708, 107156, 116186, 120239, 232372, 240478, 480956, 738611, 1477222, 2954444, 5170277, 10340554, 20681108]

約数ペア:

[(1, 20681108), (2, 10340554), (4, 5170277), (7, 2954444), (14, 1477222), (28, 738611), (43, 480956), (86, 240478), (89, 232372), (172, 120239), (178, 116186), (193, 107156), (301, 68708), (356, 58093), (386, 53578), (602, 34354), (623, 33196), (772, 26789), (1204, 17177), (1246, 16598), (1351, 15308), (2492, 8299), (2702, 7654), (3827, 5404)]