20647665

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12401}}^1$

素因数の和:12449

約数の個数: 24

約数和(自身を含む): 36759528

約数和(自身を除く): 16111863

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12401, 37203, 62005, 111609, 186015, 458837, 558045, 1376511, 2294185, 4129533, 6882555, 20647665]

約数ペア:

[(1, 20647665), (3, 6882555), (5, 4129533), (9, 2294185), (15, 1376511), (37, 558045), (45, 458837), (111, 186015), (185, 111609), (333, 62005), (555, 37203), (1665, 12401)]