21000819860

素因数分解:

$2^2\times 5^1\times {\mathrm{1050040993}}^1$

素因数の和:1050041002

約数の個数: 12

約数和(自身を含む): 44101721748

約数和(自身を除く): 23100901888

約数列:

[1, 2, 4, 5, 10, 20, 1050040993, 2100081986, 4200163972, 5250204965, 10500409930, 21000819860]

約数ペア:

[(1, 21000819860), (2, 10500409930), (4, 5250204965), (5, 4200163972), (10, 2100081986), (20, 1050040993)]