21136905

素因数分解:

$3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1949}}^1$

素因数の和:2201

約数の個数: 24

約数和(自身を含む): 36808200

約数和(自身を除く): 15671295

約数列:

[1, 3, 5, 9, 15, 45, 241, 723, 1205, 1949, 2169, 3615, 5847, 9745, 10845, 17541, 29235, 87705, 469709, 1409127, 2348545, 4227381, 7045635, 21136905]

約数ペア:

[(1, 21136905), (3, 7045635), (5, 4227381), (9, 2348545), (15, 1409127), (45, 469709), (241, 87705), (723, 29235), (1205, 17541), (1949, 10845), (2169, 9745), (3615, 5847)]