20197895

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{311}}^1\times {\mathrm{419}}^1$

素因数の和:766

約数の個数: 16

約数和(自身を含む): 25159680

約数和(自身を除く): 4961785

約数列:

[1, 5, 31, 155, 311, 419, 1555, 2095, 9641, 12989, 48205, 64945, 130309, 651545, 4039579, 20197895]

約数ペア:

[(1, 20197895), (5, 4039579), (31, 651545), (155, 130309), (311, 64945), (419, 48205), (1555, 12989), (2095, 9641)]