21248660

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25913}}^1$

素因数の和:25963

約数の個数: 24

約数和(自身を含む): 45712296

約数和(自身を除く): 24463636

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25913, 51826, 103652, 129565, 259130, 518260, 1062433, 2124866, 4249732, 5312165, 10624330, 21248660]

約数ペア:

[(1, 21248660), (2, 10624330), (4, 5312165), (5, 4249732), (10, 2124866), (20, 1062433), (41, 518260), (82, 259130), (164, 129565), (205, 103652), (410, 51826), (820, 25913)]