281008

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{193}}^1$

素因数の和:221

約数の個数: 40

約数和(自身を含む): 673568

約数和(自身を除く): 392560

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 193, 208, 364, 386, 728, 772, 1351, 1456, 1544, 2509, 2702, 3088, 5018, 5404, 10036, 10808, 17563, 20072, 21616, 35126, 40144, 70252, 140504, 281008]

約数ペア:

[(1, 281008), (2, 140504), (4, 70252), (7, 40144), (8, 35126), (13, 21616), (14, 20072), (16, 17563), (26, 10808), (28, 10036), (52, 5404), (56, 5018), (91, 3088), (104, 2702), (112, 2509), (182, 1544), (193, 1456), (208, 1351), (364, 772), (386, 728)]