640020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{10667}}^1$

素因数の和:10679

約数の個数: 24

約数和(自身を含む): 1792224

約数和(自身を除く): 1152204

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 10667, 21334, 32001, 42668, 53335, 64002, 106670, 128004, 160005, 213340, 320010, 640020]

約数ペア:

[(1, 640020), (2, 320010), (3, 213340), (4, 160005), (5, 128004), (6, 106670), (10, 64002), (12, 53335), (15, 42668), (20, 32001), (30, 21334), (60, 10667)]