20000008

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{18797}}^1$

素因数の和:18829

約数の個数: 32

約数和(自身を含む): 45115200

約数和(自身を除く): 25115192

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 152, 266, 532, 1064, 18797, 37594, 75188, 131579, 150376, 263158, 357143, 526316, 714286, 1052632, 1428572, 2500001, 2857144, 5000002, 10000004, 20000008]

約数ペア:

[(1, 20000008), (2, 10000004), (4, 5000002), (7, 2857144), (8, 2500001), (14, 1428572), (19, 1052632), (28, 714286), (38, 526316), (56, 357143), (76, 263158), (133, 150376), (152, 131579), (266, 75188), (532, 37594), (1064, 18797)]