21012455

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{2053}}^1$

素因数の和:2170

約数の個数: 16

約数和(自身を含む): 26619840

約数和(自身を除く): 5607385

約数列:

[1, 5, 23, 89, 115, 445, 2047, 2053, 10235, 10265, 47219, 182717, 236095, 913585, 4202491, 21012455]

約数ペア:

[(1, 21012455), (5, 4202491), (23, 913585), (89, 236095), (115, 182717), (445, 47219), (2047, 10265), (2053, 10235)]