19810020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{330167}}^1$

素因数の和:330179

約数の個数: 24

約数和(自身を含む): 55468224

約数和(自身を除く): 35658204

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 330167, 660334, 990501, 1320668, 1650835, 1981002, 3301670, 3962004, 4952505, 6603340, 9905010, 19810020]

約数ペア:

[(1, 19810020), (2, 9905010), (3, 6603340), (4, 4952505), (5, 3962004), (6, 3301670), (10, 1981002), (12, 1650835), (15, 1320668), (20, 990501), (30, 660334), (60, 330167)]