388977220

素因数分解:

$2^2\times 5^1\times {\mathrm{4001}}^1\times {\mathrm{4861}}^1$

素因数の和:8871

約数の個数: 24

約数和(自身を含む): 817224408

約数和(自身を除く): 428247188

約数列:

[1, 2, 4, 5, 10, 20, 4001, 4861, 8002, 9722, 16004, 19444, 20005, 24305, 40010, 48610, 80020, 97220, 19448861, 38897722, 77795444, 97244305, 194488610, 388977220]

約数ペア:

[(1, 388977220), (2, 194488610), (4, 97244305), (5, 77795444), (10, 38897722), (20, 19448861), (4001, 97220), (4861, 80020), (8002, 48610), (9722, 40010), (16004, 24305), (19444, 20005)]