21019480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30911}}^1$

素因数の和:30939

約数の個数: 32

約数和(自身を含む): 50077440

約数和(自身を除く): 29057960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30911, 61822, 123644, 154555, 247288, 309110, 525487, 618220, 1050974, 1236440, 2101948, 2627435, 4203896, 5254870, 10509740, 21019480]

約数ペア:

[(1, 21019480), (2, 10509740), (4, 5254870), (5, 4203896), (8, 2627435), (10, 2101948), (17, 1236440), (20, 1050974), (34, 618220), (40, 525487), (68, 309110), (85, 247288), (136, 154555), (170, 123644), (340, 61822), (680, 30911)]