20905635

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{10639}}^1$

素因数の和:10778

約数の個数: 16

約数和(自身を含む): 33707520

約数和(自身を除く): 12801885

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 10639, 31917, 53195, 159585, 1393709, 4181127, 6968545, 20905635]

約数ペア:

[(1, 20905635), (3, 6968545), (5, 4181127), (15, 1393709), (131, 159585), (393, 53195), (655, 31917), (1965, 10639)]