21682960

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20849}}^1$

素因数の和:20875

約数の個数: 40

約数和(自身を含む): 54293400

約数和(自身を除く): 32610440

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20849, 41698, 83396, 104245, 166792, 208490, 271037, 333584, 416980, 542074, 833960, 1084148, 1355185, 1667920, 2168296, 2710370, 4336592, 5420740, 10841480, 21682960]

約数ペア:

[(1, 21682960), (2, 10841480), (4, 5420740), (5, 4336592), (8, 2710370), (10, 2168296), (13, 1667920), (16, 1355185), (20, 1084148), (26, 833960), (40, 542074), (52, 416980), (65, 333584), (80, 271037), (104, 208490), (130, 166792), (208, 104245), (260, 83396), (520, 41698), (1040, 20849)]