12820305

素因数分解:

$3^1\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1321}}^1$

素因数の和:1976

約数の個数: 16

約数和(自身を含む): 20559744

約数和(自身を除く): 7739439

約数列:

[1, 3, 5, 15, 647, 1321, 1941, 3235, 3963, 6605, 9705, 19815, 854687, 2564061, 4273435, 12820305]

約数ペア:

[(1, 12820305), (3, 4273435), (5, 2564061), (15, 854687), (647, 19815), (1321, 9705), (1941, 6605), (3235, 3963)]