18989870

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{4643}}^1$

素因数の和:5059

約数の個数: 16

約数和(自身を含む): 34272720

約数和(自身を除く): 15282850

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 4643, 9286, 23215, 46430, 1898987, 3797974, 9494935, 18989870]

約数ペア:

[(1, 18989870), (2, 9494935), (5, 3797974), (10, 1898987), (409, 46430), (818, 23215), (2045, 9286), (4090, 4643)]