20420944

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{389}}^1$

素因数の和:607

約数の個数: 40

約数和(自身を含む): 42218280

約数和(自身を除く): 21797336

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 193, 272, 386, 389, 772, 778, 1544, 1556, 3088, 3112, 3281, 6224, 6562, 6613, 13124, 13226, 26248, 26452, 52496, 52904, 75077, 105808, 150154, 300308, 600616, 1201232, 1276309, 2552618, 5105236, 10210472, 20420944]

約数ペア:

[(1, 20420944), (2, 10210472), (4, 5105236), (8, 2552618), (16, 1276309), (17, 1201232), (34, 600616), (68, 300308), (136, 150154), (193, 105808), (272, 75077), (386, 52904), (389, 52496), (772, 26452), (778, 26248), (1544, 13226), (1556, 13124), (3088, 6613), (3112, 6562), (3281, 6224)]