21409105

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{409}}^1$

素因数の和:481

約数の個数: 24

約数和(自身を含む): 28117800

約数和(自身を除く): 6708695

約数列:

[1, 5, 19, 29, 95, 145, 361, 409, 551, 1805, 2045, 2755, 7771, 10469, 11861, 38855, 52345, 59305, 147649, 225359, 738245, 1126795, 4281821, 21409105]

約数ペア:

[(1, 21409105), (5, 4281821), (19, 1126795), (29, 738245), (95, 225359), (145, 147649), (361, 59305), (409, 52345), (551, 38855), (1805, 11861), (2045, 10469), (2755, 7771)]