21685420

素因数分解:

$2^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{4001}}^1$

素因数の和:4281

約数の個数: 24

約数和(自身を含む): 45718848

約数和(自身を除く): 24033428

約数列:

[1, 2, 4, 5, 10, 20, 271, 542, 1084, 1355, 2710, 4001, 5420, 8002, 16004, 20005, 40010, 80020, 1084271, 2168542, 4337084, 5421355, 10842710, 21685420]

約数ペア:

[(1, 21685420), (2, 10842710), (4, 5421355), (5, 4337084), (10, 2168542), (20, 1084271), (271, 80020), (542, 40010), (1084, 20005), (1355, 16004), (2710, 8002), (4001, 5420)]