19740097940

素因数分解:

$2^2\times 5^1\times {\mathrm{987004897}}^1$

素因数の和:987004906

約数の個数: 12

約数和(自身を含む): 41454205716

約数和(自身を除く): 21714107776

約数列:

[1, 2, 4, 5, 10, 20, 987004897, 1974009794, 3948019588, 4935024485, 9870048970, 19740097940]

約数ペア:

[(1, 19740097940), (2, 9870048970), (4, 4935024485), (5, 3948019588), (10, 1974009794), (20, 987004897)]