20684000

素因数分解:

$2^5\times 5^3\times {\mathrm{5171}}^1$

素因数の和:5196

約数の個数: 48

約数和(自身を含む): 50830416

約数和(自身を除く): 30146416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 5171, 10342, 20684, 25855, 41368, 51710, 82736, 103420, 129275, 165472, 206840, 258550, 413680, 517100, 646375, 827360, 1034200, 1292750, 2068400, 2585500, 4136800, 5171000, 10342000, 20684000]

約数ペア:

[(1, 20684000), (2, 10342000), (4, 5171000), (5, 4136800), (8, 2585500), (10, 2068400), (16, 1292750), (20, 1034200), (25, 827360), (32, 646375), (40, 517100), (50, 413680), (80, 258550), (100, 206840), (125, 165472), (160, 129275), (200, 103420), (250, 82736), (400, 51710), (500, 41368), (800, 25855), (1000, 20684), (2000, 10342), (4000, 5171)]