20851570

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{90659}}^1$

素因数の和:90689

約数の個数: 16

約数和(自身を含む): 39165120

約数和(自身を除く): 18313550

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 90659, 181318, 453295, 906590, 2085157, 4170314, 10425785, 20851570]

約数ペア:

[(1, 20851570), (2, 10425785), (5, 4170314), (10, 2085157), (23, 906590), (46, 453295), (115, 181318), (230, 90659)]