20404040

素因数分解:

$2^3\times 5^1\times {\mathrm{510101}}^1$

素因数の和:510112

約数の個数: 16

約数和(自身を含む): 45909180

約数和(自身を除く): 25505140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 510101, 1020202, 2040404, 2550505, 4080808, 5101010, 10202020, 20404040]

約数ペア:

[(1, 20404040), (2, 10202020), (4, 5101010), (5, 4080808), (8, 2550505), (10, 2040404), (20, 1020202), (40, 510101)]