21420400

素因数分解:

$2^4\times 5^2\times {\mathrm{53551}}^1$

素因数の和:53569

約数の個数: 30

約数和(自身を含む): 51463472

約数和(自身を除く): 30043072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 53551, 107102, 214204, 267755, 428408, 535510, 856816, 1071020, 1338775, 2142040, 2677550, 4284080, 5355100, 10710200, 21420400]

約数ペア:

[(1, 21420400), (2, 10710200), (4, 5355100), (5, 4284080), (8, 2677550), (10, 2142040), (16, 1338775), (20, 1071020), (25, 856816), (40, 535510), (50, 428408), (80, 267755), (100, 214204), (200, 107102), (400, 53551)]