12215905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2647}}^1$

素因数の和:2736

約数の個数: 16

約数和(自身を含む): 16015104

約数和(自身を除く): 3799199

約数列:

[1, 5, 13, 65, 71, 355, 923, 2647, 4615, 13235, 34411, 172055, 187937, 939685, 2443181, 12215905]

約数ペア:

[(1, 12215905), (5, 2443181), (13, 939685), (65, 187937), (71, 172055), (355, 34411), (923, 13235), (2647, 4615)]