21021945

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11777}}^1$

素因数の和:11809

約数の個数: 32

約数和(自身を含む): 40704768

約数和(自身を除く): 19682823

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11777, 35331, 58885, 82439, 176655, 200209, 247317, 412195, 600627, 1001045, 1236585, 1401463, 3003135, 4204389, 7007315, 21021945]

約数ペア:

[(1, 21021945), (3, 7007315), (5, 4204389), (7, 3003135), (15, 1401463), (17, 1236585), (21, 1001045), (35, 600627), (51, 412195), (85, 247317), (105, 200209), (119, 176655), (255, 82439), (357, 58885), (595, 35331), (1785, 11777)]