21986705

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{937}}^1$

素因数の和:993

約数の個数: 24

約数和(自身を含む): 30019752

約数和(自身を除く): 8033047

約数列:

[1, 5, 13, 19, 65, 95, 247, 361, 937, 1235, 1805, 4685, 4693, 12181, 17803, 23465, 60905, 89015, 231439, 338257, 1157195, 1691285, 4397341, 21986705]

約数ペア:

[(1, 21986705), (5, 4397341), (13, 1691285), (19, 1157195), (65, 338257), (95, 231439), (247, 89015), (361, 60905), (937, 23465), (1235, 17803), (1805, 12181), (4685, 4693)]