21305305

素因数分解:

$5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{5689}}^1$

素因数の和:5808

約数の個数: 16

約数和(自身を含む): 29496960

約数和(自身を除く): 8191655

約数列:

[1, 5, 7, 35, 107, 535, 749, 3745, 5689, 28445, 39823, 199115, 608723, 3043615, 4261061, 21305305]

約数ペア:

[(1, 21305305), (5, 4261061), (7, 3043615), (35, 608723), (107, 199115), (535, 39823), (749, 28445), (3745, 5689)]