21000888005

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{71}}^1\times {\mathrm{163871}}^1$

素因数の和:163985

約数の個数: 24

約数和(自身を含む): 26972020224

約数和(自身を除く): 5971132219

約数列:

[1, 5, 19, 71, 95, 355, 361, 1349, 1805, 6745, 25631, 128155, 163871, 819355, 3113549, 11634841, 15567745, 58174205, 59157431, 221061979, 295787155, 1105309895, 4200177601, 21000888005]

約数ペア:

[(1, 21000888005), (5, 4200177601), (19, 1105309895), (71, 295787155), (95, 221061979), (355, 59157431), (361, 58174205), (1349, 15567745), (1805, 11634841), (6745, 3113549), (25631, 819355), (128155, 163871)]