128551760

素因数分解:

$2^4\times 5^1\times {\mathrm{1606897}}^1$

素因数の和:1606910

約数の個数: 20

約数和(自身を含む): 298883028

約数和(自身を除く): 170331268

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1606897, 3213794, 6427588, 8034485, 12855176, 16068970, 25710352, 32137940, 64275880, 128551760]

約数ペア:

[(1, 128551760), (2, 64275880), (4, 32137940), (5, 25710352), (8, 16068970), (10, 12855176), (16, 8034485), (20, 6427588), (40, 3213794), (80, 1606897)]