21307155

素因数分解:

$3^1\times 5^1\times {\mathrm{317}}^1\times {\mathrm{4481}}^1$

素因数の和:4806

約数の個数: 16

約数和(自身を含む): 34206624

約数和(自身を除く): 12899469

約数列:

[1, 3, 5, 15, 317, 951, 1585, 4481, 4755, 13443, 22405, 67215, 1420477, 4261431, 7102385, 21307155]

約数ペア:

[(1, 21307155), (3, 7102385), (5, 4261431), (15, 1420477), (317, 67215), (951, 22405), (1585, 13443), (4481, 4755)]