18989840020

素因数分解:

$2^2\times 5^1\times {\mathrm{949492001}}^1$

素因数の和:949492010

約数の個数: 12

約数和(自身を含む): 39878664084

約数和(自身を除く): 20888824064

約数列:

[1, 2, 4, 5, 10, 20, 949492001, 1898984002, 3797968004, 4747460005, 9494920010, 18989840020]

約数ペア:

[(1, 18989840020), (2, 9494920010), (4, 4747460005), (5, 3797968004), (10, 1898984002), (20, 949492001)]