21906005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{17317}}^1$

素因数の和:17356

約数の個数: 16

約数和(自身を含む): 29925504

約数和(自身を除く): 8019499

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 17317, 86585, 190487, 398291, 952435, 1991455, 4381201, 21906005]

約数ペア:

[(1, 21906005), (5, 4381201), (11, 1991455), (23, 952435), (55, 398291), (115, 190487), (253, 86585), (1265, 17317)]