20171965

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{12647}}^1$

素因数の和:12692

約数の個数: 16

約数和(自身を含む): 27319680

約数和(自身を除く): 7147715

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 12647, 63235, 139117, 366763, 695585, 1833815, 4034393, 20171965]

約数ペア:

[(1, 20171965), (5, 4034393), (11, 1833815), (29, 695585), (55, 366763), (145, 139117), (319, 63235), (1595, 12647)]