21012197905

素因数分解:

$5^1\times {\mathrm{281}}^1\times {\mathrm{461}}^1\times {\mathrm{32441}}^1$

素因数の和:33188

約数の個数: 16

約数和(自身を含む): 25360041168

約数和(自身を除く): 4347843263

約数列:

[1, 5, 281, 461, 1405, 2305, 32441, 129541, 162205, 647705, 9115921, 14955301, 45579605, 74776505, 4202439581, 21012197905]

約数ペア:

[(1, 21012197905), (5, 4202439581), (281, 74776505), (461, 45579605), (1405, 14955301), (2305, 9115921), (32441, 647705), (129541, 162205)]