18999580

素因数分解:

$2^2\times 5^1\times {\mathrm{949979}}^1$

素因数の和:949988

約数の個数: 12

約数和(自身を含む): 39899160

約数和(自身を除く): 20899580

約数列:

[1, 2, 4, 5, 10, 20, 949979, 1899958, 3799916, 4749895, 9499790, 18999580]

約数ペア:

[(1, 18999580), (2, 9499790), (4, 4749895), (5, 3799916), (10, 1899958), (20, 949979)]