16720280

素因数分解:

$2^3\times 5^1\times {\mathrm{418007}}^1$

素因数の和:418018

約数の個数: 16

約数和(自身を含む): 37620720

約数和(自身を除く): 20900440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 418007, 836014, 1672028, 2090035, 3344056, 4180070, 8360140, 16720280]

約数ペア:

[(1, 16720280), (2, 8360140), (4, 4180070), (5, 3344056), (8, 2090035), (10, 1672028), (20, 836014), (40, 418007)]