20909565

素因数分解:

$3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3547}}^1$

素因数の和:3689

約数の個数: 24

約数和(自身を含む): 36530208

約数和(自身を除く): 15620643

約数列:

[1, 3, 5, 9, 15, 45, 131, 393, 655, 1179, 1965, 3547, 5895, 10641, 17735, 31923, 53205, 159615, 464657, 1393971, 2323285, 4181913, 6969855, 20909565]

約数ペア:

[(1, 20909565), (3, 6969855), (5, 4181913), (9, 2323285), (15, 1393971), (45, 464657), (131, 159615), (393, 53205), (655, 31923), (1179, 17735), (1965, 10641), (3547, 5895)]