21678340

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26437}}^1$

素因数の和:26487

約数の個数: 24

約数和(自身を含む): 46636632

約数和(自身を除く): 24958292

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26437, 52874, 105748, 132185, 264370, 528740, 1083917, 2167834, 4335668, 5419585, 10839170, 21678340]

約数ペア:

[(1, 21678340), (2, 10839170), (4, 5419585), (5, 4335668), (10, 2167834), (20, 1083917), (41, 528740), (82, 264370), (164, 132185), (205, 105748), (410, 52874), (820, 26437)]