21278820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{354647}}^1$

素因数の和:354659

約数の個数: 24

約数和(自身を含む): 59580864

約数和(自身を除く): 38302044

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 354647, 709294, 1063941, 1418588, 1773235, 2127882, 3546470, 4255764, 5319705, 7092940, 10639410, 21278820]

約数ペア:

[(1, 21278820), (2, 10639410), (3, 7092940), (4, 5319705), (5, 4255764), (6, 3546470), (10, 2127882), (12, 1773235), (15, 1418588), (20, 1063941), (30, 709294), (60, 354647)]