1398889780

素因数分解:

$2^2\times 5^1\times {\mathrm{69944489}}^1$

素因数の和:69944498

約数の個数: 12

約数和(自身を含む): 2937668580

約数和(自身を除く): 1538778800

約数列:

[1, 2, 4, 5, 10, 20, 69944489, 139888978, 279777956, 349722445, 699444890, 1398889780]

約数ペア:

[(1, 1398889780), (2, 699444890), (4, 349722445), (5, 279777956), (10, 139888978), (20, 69944489)]