21016120

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5101}}^1$

素因数の和:5215

約数の個数: 32

約数和(自身を含む): 47754720

約数和(自身を除く): 26738600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5101, 10202, 20404, 25505, 40808, 51010, 102020, 204040, 525403, 1050806, 2101612, 2627015, 4203224, 5254030, 10508060, 21016120]

約数ペア:

[(1, 21016120), (2, 10508060), (4, 5254030), (5, 4203224), (8, 2627015), (10, 2101612), (20, 1050806), (40, 525403), (103, 204040), (206, 102020), (412, 51010), (515, 40808), (824, 25505), (1030, 20404), (2060, 10202), (4120, 5101)]