21407390

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{15401}}^1$

素因数の和:15547

約数の個数: 16

約数和(自身を含む): 38813040

約数和(自身を除く): 17405650

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 15401, 30802, 77005, 154010, 2140739, 4281478, 10703695, 21407390]

約数ペア:

[(1, 21407390), (2, 10703695), (5, 4281478), (10, 2140739), (139, 154010), (278, 77005), (695, 30802), (1390, 15401)]