20173904

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{193}}^1$

素因数の和:387

約数の個数: 40

約数和(自身を含む): 40414080

約数和(自身を除く): 20240176

約数列:

[1, 2, 4, 8, 16, 47, 94, 139, 188, 193, 278, 376, 386, 556, 752, 772, 1112, 1544, 2224, 3088, 6533, 9071, 13066, 18142, 26132, 26827, 36284, 52264, 53654, 72568, 104528, 107308, 145136, 214616, 429232, 1260869, 2521738, 5043476, 10086952, 20173904]

約数ペア:

[(1, 20173904), (2, 10086952), (4, 5043476), (8, 2521738), (16, 1260869), (47, 429232), (94, 214616), (139, 145136), (188, 107308), (193, 104528), (278, 72568), (376, 53654), (386, 52264), (556, 36284), (752, 26827), (772, 26132), (1112, 18142), (1544, 13066), (2224, 9071), (3088, 6533)]