20494990

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{5011}}^1$

素因数の和:5427

約数の個数: 16

約数和(自身を含む): 36988560

約数和(自身を除く): 16493570

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 5011, 10022, 25055, 50110, 2049499, 4098998, 10247495, 20494990]

約数ペア:

[(1, 20494990), (2, 10247495), (5, 4098998), (10, 2049499), (409, 50110), (818, 25055), (2045, 10022), (4090, 5011)]