20209000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{2887}}^1$

素因数の和:2915

約数の個数: 64

約数和(自身を含む): 54063360

約数和(自身を除く): 33854360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 250, 280, 350, 500, 700, 875, 1000, 1400, 1750, 2887, 3500, 5774, 7000, 11548, 14435, 20209, 23096, 28870, 40418, 57740, 72175, 80836, 101045, 115480, 144350, 161672, 202090, 288700, 360875, 404180, 505225, 577400, 721750, 808360, 1010450, 1443500, 2020900, 2526125, 2887000, 4041800, 5052250, 10104500, 20209000]

約数ペア:

[(1, 20209000), (2, 10104500), (4, 5052250), (5, 4041800), (7, 2887000), (8, 2526125), (10, 2020900), (14, 1443500), (20, 1010450), (25, 808360), (28, 721750), (35, 577400), (40, 505225), (50, 404180), (56, 360875), (70, 288700), (100, 202090), (125, 161672), (140, 144350), (175, 115480), (200, 101045), (250, 80836), (280, 72175), (350, 57740), (500, 40418), (700, 28870), (875, 23096), (1000, 20209), (1400, 14435), (1750, 11548), (2887, 7000), (3500, 5774)]