21218960

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5413}}^1$

素因数の和:5440

約数の個数: 60

約数和(自身を含む): 57399228

約数和(自身を除く): 36180268

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5413, 10826, 21652, 27065, 37891, 43304, 54130, 75782, 86608, 108260, 151564, 189455, 216520, 265237, 303128, 378910, 433040, 530474, 606256, 757820, 1060948, 1326185, 1515640, 2121896, 2652370, 3031280, 4243792, 5304740, 10609480, 21218960]

約数ペア:

[(1, 21218960), (2, 10609480), (4, 5304740), (5, 4243792), (7, 3031280), (8, 2652370), (10, 2121896), (14, 1515640), (16, 1326185), (20, 1060948), (28, 757820), (35, 606256), (40, 530474), (49, 433040), (56, 378910), (70, 303128), (80, 265237), (98, 216520), (112, 189455), (140, 151564), (196, 108260), (245, 86608), (280, 75782), (392, 54130), (490, 43304), (560, 37891), (784, 27065), (980, 21652), (1960, 10826), (3920, 5413)]