21283640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10859}}^1$

素因数の和:10884

約数の個数: 48

約数和(自身を含む): 55711800

約数和(自身を除く): 34428160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10859, 21718, 43436, 54295, 76013, 86872, 108590, 152026, 217180, 304052, 380065, 434360, 532091, 608104, 760130, 1064182, 1520260, 2128364, 2660455, 3040520, 4256728, 5320910, 10641820, 21283640]

約数ペア:

[(1, 21283640), (2, 10641820), (4, 5320910), (5, 4256728), (7, 3040520), (8, 2660455), (10, 2128364), (14, 1520260), (20, 1064182), (28, 760130), (35, 608104), (40, 532091), (49, 434360), (56, 380065), (70, 304052), (98, 217180), (140, 152026), (196, 108590), (245, 86872), (280, 76013), (392, 54295), (490, 43436), (980, 21718), (1960, 10859)]